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  1. rumblebox

    74 K20 468 build

    I'm starting a new thread, since practically everything about the build changed, and i can't edit my OP. The engine that came out of the truck was trashed. The knock ended up being a loose rod cap, which ultimately introduced the #1 rod to the #2 cylinder. So i found a big block in a 79 Z28...
  2. rumblebox

    91 V1500 suburban

    I jumped the oil pressure switch and replaced the fuel pump to get it running and drive it around the property, but it sat another 6 months, and the fuel pump won't come on again, although there wasn't a bit of rust in the gas tank. New alternator and belt It didn't have any brake fluid in it...
  3. rumblebox

    81 crew cab C20 "Trailering Special"

    92k miles, 454, TH400. New fuel senders, electric pump. Comes with but not installed: new quiet mufflers, new RV cam/lifters. Chassis is tight and quiet. It ran great after some TLC until the cam went flat, and i haven't had time to swap it. $2300 with the BFG's $1800 with crappy tires...
  4. rumblebox

    1965 BBC oval port, squarebore carb factory intake

    $150 local pickup Sent from my LG-H910 using Tapatalk
  5. rumblebox

    Swapping an 81 454 into a 74 pickup.

    Is there anything I should know regarding fitment before I do this? Is it as simple as it should be? Sent from my LG-H910 using Tapatalk
  6. rumblebox

    ECM compatability between years (dead V1500 diagnosis)

    I'm working on a 91 v1500 suburban, and i need to try another ECM. Can i try one from like a 94 k1500? Theres no power going to the fuel pump, and even with the [new] fuel pump hot-wired, it still only fires if i pour gas down the intake. The SES light would come on sporadically with the key...
  7. rumblebox

    Backfiring through carb and getting worse, even at idle

    My 81 with a 454 and smog has started to backfire horribly when I give it any gas at all. Now it even does it idling when the timing is set correctly. This happens regardless if the EFE flap in the manifold is open or closed. The left exhaust pipe is significantly louder than the right one, and...
  8. rumblebox

    Can't find low side AC fitting

    I'm doing the R134A conversion and can't find the low side fitting in my 81. Does it even have one? Sent from my SAMSUNG-SM-G870A using Tapatalk
  9. rumblebox

    My 454 build

    So the 454 in my '74 knocked forever before recently locking up. I didn't care so much, because i have a complete 454 that originally came out of an early 80's RV. I finally picked up the engine and disassembled it to the shortblock. It had peanut heads, which isn't a big deal since I'm using...
  10. rumblebox

    Crew cab, short bed, half ton, 4wd project idea. Input requested.

    I have a single cab long bed 75 K10 and an 81 crew cab c20, and the idea is to stretch and cut the frames on both trucks to put the crew cab on the 75, and cut it down to a short bed. I've heard that it's easier just to start out with a four wheel drive frame than to try and convert a 2 wheel...
  11. rumblebox

    Found a mud truck for my brother

    I was going to buy this truck for parts, but my brother wants to go full-redneck and make a mud truck out of it. Are you guys mudding half-tons with small blocks without destroying axles frequently, or does it need an upgrade for sure?
  12. rumblebox

    AC parts from an 81 into a 74.

    I'm buying a running 81 C20 just to pull the 454 and a few various parts for my 74, including any AC components required to get the factory AC working again. I definitely have to use the compressor and hoses, but does everything else switch over too, like the blower, switches, control unit...
  13. rumblebox

    To paint or patina

    Due to budget constraints, my only immediate option is to patina, but I'm debating whether or not to even paint the thing in the long run. It has a relatively straight body with all the original sheetmetal and minimal rust.
  14. rumblebox

    Can.....not.....find.....hubcaps

    I've been looking, and it seems the 12" poverty hubcaps are as rare as an honest politician. Any tips that aren't astronomically priced?
  15. rumblebox

    .030" quench: too tight?

    I'm trying to get as much compression and as little ping as possible out of my 473 with flat tops and 781 heads. Instead of having the machine shop zero the deck, i want to go down another .010 so i can have a .030 quench without having to pay extra for thinner gaskets. It will make about...
  16. rumblebox

    I'm strongly considering going with 3.08's

    I'm about to build a stump-puller big block, and I want to use 3.08 gears so I can just use granny low as first gear, and 4th gear will only turn about 2400 RPM at 70. I know the gap between 2nd and 3rd really sucks, but with the torque curve this engine will have, I think I should be ok. Have...
  17. rumblebox

    Cleaned up the 74 K20

    I got the BFG's for free. Now it's time to rebuild the 454.
  18. rumblebox

    Ignition switch actuator busted

    I found one on ebay. Will it work on a '74 non-tilt? http://pages.ebay.com/motors/link/?nav=item.view&id=161736357037&alt=web
  19. rumblebox

    rod knock when warm, good oil pressure. just replace bearings?

    So my newly-acquired 454 has a subdle rod knock, but it has good pressure and cold-starts quietly most of the time. I'm strongly considering pulling the earl pan, mic'ing the crank, and just changing the rod bearings according to wear with some vattozone .001 or .002 under bearings accordingly...
  20. rumblebox

    my dirt cheap 454 build

    I know the term, "cheap," is relative, but I'm used to LSX engines..... So I got a K20 with a 454 that has a subtle rod knock. So I'm going to freshen it up and add dome pistons, a mild cam, air gap, ebay headers, rebuild the Q-jet, and do some mild work to the 781's that came on it. The plan...
  21. rumblebox

    I'm the 2nd owner of a 74 K20 with a 454, my first old school project.

    My uncle bought this truck brand new. For a truck that has definitely been ridden hard and put away wet, it has minimal rust and dints. He installed the 454 in the 80's, and the 4speed/Tcase have been replaced somewhere along the way too, which are still tight, along with the front end. Ive...

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