1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

72-older SBC ram horn manifolds on a 73-up?

Discussion in 'Tech Discussion' started by fast68chevy, Jan 26, 2021.

  1. fast68chevy

    fast68chevy I am the original fast68chevy

    Posts:
    154
    Likes Received:
    70
    Joined:
    Oct 17, 2020
    Location:
    LINCOLN IL
    First Name:
    RANDY
    Truck Year:
    1975
    Truck Model:
    C20
    Engine Size:
    350
    one thing i have never tried and am ready to find out if wil fit and work are the '72 and oldr SB ram horn exhaust manifolds, will any of them fit and clear the 2wd suspension motor cradle and stock clamshell motor mounts? straight down exits or angled back exits?

    no one makes carries head pipes for the '73-up sbc common log style manifolds, but they do make them for the 72 older trucks and i need exhaust asap badly for my bone stock '75 C20 350 daily driver beater, it is now down to the original stock rusted out and splitting open y-pipe with a super old rusted junky tube muffler. all falling apart condition bad...


    and i cant find anyone around here or anywhere with any exhaust 2-1/4" duals for these trucks anywhere around here or anywhere online.. just dont exist, impossible,.. so im hoping to get 72 older exhaust and put on ram horn manifolds, it looks like.. i have a couple or few ram horn manifolds around here stashed.

    i remember that the 73-up log manifolds wont fit work with stock 72 oldr sbc mounts because the log manifolds sit down on the clam shell frame trees before the mounts touch the frame trees. but ive never actualy tried any ram horn manifold with 73-up clam shell mounts. dont the corvettes use clamshells with the ram horns? if those work together clear then they should in a truck too i would think? same bolted distances apart same motor block dimensions etc...

    do the vettes have a susp motor cradle under the motor like the trucks though? center dump?




    who knows what for sure?
    i need 2-3/4" duals badly asap somehow,... and i totally give up posting ads in this area, trying to find anyone with any exhaust dual pipes system from a parts truck anything.. because there arent any...around here at all anymore. they all got scrapped lot of years ago around here, and are long gone now... impossible.,. im not gonna run headers. i want manifolds.

    here is a pic that i found on the interwebs, of a stock ram horn center dump exit manifold on a truck with 72 oldr motor mount... but there is no frame tree bracket. and since it is not clam shell style mount, it doesnt help me at all in determing if it may clear/work with a motor mount 73-up 2wd style anyways..
    SL386355.JPG
     
    Last edited: Jan 26, 2021
  2. idahovette

    idahovette Full Access Member

    Age:
    72
    Posts:
    2,808
    Likes Received:
    3,915
    Joined:
    Aug 7, 2016
    Location:
    Weiser Idaho
    First Name:
    Perry
    Truck Year:
    1975-1979
    Truck Model:
    K20-K10
    Engine Size:
    350
    No exhaust shops around your area? Someone with a bender could fab up a couple of head pipes pretty quickly, I would think., 2 1/4 or 2 3/4 diameter? Why not 2 1/2 or 3, more common.
     
    Vbb199 and 78C10BigTen like this.
  3. QBuff02

    QBuff02 I like Big Blocks and I cannot lie Supporting Member

    Posts:
    652
    Likes Received:
    998
    Joined:
    Feb 28, 2017
    Location:
    Central IL
    First Name:
    Quincy
    Truck Year:
    1982
    Truck Model:
    K30
    Engine Size:
    454
    i'm going to be pulling dual 2 1/2" exhaust off of my K30 long bed truck at some point before spring, but it's currently set up for headers. however a couple of parts store pipes could make it mate to manifolds probably fairly easily. don't know how fast you're looking for exhaust? It has flowmaster delta 44's for mufflers, that i'd probably sell ya the whole shebang for a decent price if you're interested.
     
    80BrownK10 and 78C10BigTen like this.
  4. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    I do not have any rams horns laying around to even try, or I would because I also want to do rams horns on a square. Anybody know if they fit?????
     
    80BrownK10 likes this.
  5. bucket

    bucket Super Moderator Staff Member

    Age:
    39
    Posts:
    23,130
    Likes Received:
    9,550
    Joined:
    Aug 3, 2010
    Location:
    Usually not in Ohio
    First Name:
    Andy
    Truck Year:
    '77, '78, '79, '84, '88
    Truck Model:
    K5 thru K30
    Engine Size:
    350-454
    Someone here swapped on some rams horns years ago. I thought it was Kapdin, but that must not be right because I can't find a user with that name.
     
    80BrownK10 likes this.
  6. PrairieDrifter

    PrairieDrifter Full Access Member

    Posts:
    1,806
    Likes Received:
    1,016
    Joined:
    Dec 28, 2014
    Location:
    North Dakota
    First Name:
    Mason
    Truck Year:
    84,79,77,70,48
    Truck Model:
    Suburban k10, bonanza k10, c30 C&C, c10, gmc 1/2ton
    Engine Size:
    350, 350, 350, 350, 350
    It may have been me.
     
    80BrownK10 and bucket like this.
  7. PrairieDrifter

    PrairieDrifter Full Access Member

    Posts:
    1,806
    Likes Received:
    1,016
    Joined:
    Dec 28, 2014
    Location:
    North Dakota
    First Name:
    Mason
    Truck Year:
    84,79,77,70,48
    Truck Model:
    Suburban k10, bonanza k10, c30 C&C, c10, gmc 1/2ton
    Engine Size:
    350, 350, 350, 350, 350
    67-72 will work, I'm not 100% on the straight dumps, but the turn back dumps will work just fine. This is a 4wd truck that mine are on, but you need the manifolds with no bracket type deals, casted on the front.

    825BA555-08E5-4352-A2E3-5AC6EC2E51E5.jpeg

    C867BF60-25A8-4835-AC8D-EC7688D54E15.jpeg

    CCC7C2C3-67D6-4CC7-AD18-4C4BDC46C790.jpeg

    92762F86-9978-40B8-8CE3-7FF1A6B4380E.jpeg
     
    80BrownK10, K10farmtruck and bucket like this.
  8. 77 K20

    77 K20 Full Access Member

    Posts:
    2,446
    Likes Received:
    1,594
    Joined:
    Nov 9, 2012
    Location:
    Montana
    First Name:
    Mike
    Truck Year:
    1977
    Truck Model:
    K20 5" lift
    Engine Size:
    HT383 fuel injected
    I bought some 2.5" center dump manifolds 8 years ago for my 400. The exhaust shop said there was a slight clearance issue on the driver side with the manifold and the clamshell. They cut out part of the clamshell and welded on it underneath to strengthen it back up. The 400 was then replaced with a 383 with vortec heads. Manifolds still work and have been leak free.

    Manifolds were bought here:
    https://www.speedwaymotors.com/Corvette-Style-2-1-2-Inch-Ram-Horn-Exhaust-Manifold,9133.html

    Great deal at $60 each. I didn't need any of the bracket stuff so I ground it off.

    [​IMG]

    [​IMG]

    [​IMG]

    This is on a 4wd... not sure how different a 2wd is.
     
    80BrownK10, Ricko1966 and 78C10BigTen like this.
  9. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Well 68 and I both still need to know about 2wd. But thank you everyone. Come on somebody's tried center dump rams horns or block huggers on 2wd
     
    80BrownK10 likes this.
  10. DoubleDingo

    DoubleDingo Drain The Swamp, Completely

    Posts:
    6,188
    Likes Received:
    5,349
    Joined:
    Jul 3, 2012
    Location:
    Right where I am
    First Name:
    Bagoomba
    Truck Year:
    1981, 1965
    Truck Model:
    81-C20 Silverado Camper Special-TH400-4.10s; 65-C20 with 4:57 gears and Borg Warner Overdrive
    Engine Size:
    Carb'ed Vortec 350; 1972 L48 350

    67-72 is what you want.
     
    80BrownK10 and PrairieDrifter like this.
  11. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Those are angle dump though. I need to know if a straight dump will work.Anyone? Anyone?
     
  12. PrairieDrifter

    PrairieDrifter Full Access Member

    Posts:
    1,806
    Likes Received:
    1,016
    Joined:
    Dec 28, 2014
    Location:
    North Dakota
    First Name:
    Mason
    Truck Year:
    84,79,77,70,48
    Truck Model:
    Suburban k10, bonanza k10, c30 C&C, c10, gmc 1/2ton
    Engine Size:
    350, 350, 350, 350, 350
    Why not just do angled dump? Less exhaust work, looks better imo
     
    bucket, 80BrownK10 and DoubleDingo like this.
  13. DoubleDingo

    DoubleDingo Drain The Swamp, Completely

    Posts:
    6,188
    Likes Received:
    5,349
    Joined:
    Jul 3, 2012
    Location:
    Right where I am
    First Name:
    Bagoomba
    Truck Year:
    1981, 1965
    Truck Model:
    81-C20 Silverado Camper Special-TH400-4.10s; 65-C20 with 4:57 gears and Borg Warner Overdrive
    Engine Size:
    Carb'ed Vortec 350; 1972 L48 350
    Angled is better.
     
    bucket and PrairieDrifter like this.
  14. 75gmck25

    75gmck25 Full Access Member

    Posts:
    1,099
    Likes Received:
    713
    Joined:
    Oct 13, 2016
    Location:
    Northern Virginia
    First Name:
    Bruce
    Truck Year:
    1975
    Truck Model:
    K25 Camper Special TH350 NP203
    Engine Size:
    5.7
    The angled dump rams horn manifolds may fit better, but they are 2”, not 2.5”. It just depends on whether you want the 2.5” exhaust.

    Both angled dump and straight dump clone manifolds are available from many sources, and for about $140-180/pair they appear to be identical to those sold by Dorman.

    Bruce


    Bruce
     
  15. Green79Scottsdale

    Green79Scottsdale Full Access Member

    Posts:
    1,902
    Likes Received:
    1,634
    Joined:
    Aug 8, 2010
    Location:
    G.R. - MI
    First Name:
    Bob
    Truck Year:
    1979
    Truck Model:
    K20
    Engine Size:
    400
    Are you guys putting these on modified engines?
     

Share This Page