Free 383 for Blaze

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

74Blaze

Full Access Member
Joined
Oct 25, 2022
Posts
332
Reaction score
1,335
Location
Nashville, IN
First Name
Gerald
Truck Year
1974
Truck Model
K5/Blazer
Engine Size
350
@xm20k: A different Cam is definitely in the plan. The one that was in it was spec-ed when the engine was planned to go into the '55 street race application.
 
Joined
Jul 20, 2021
Posts
953
Reaction score
3,483
Location
Tennessee
First Name
Matt
Truck Year
1979
Truck Model
C10
Engine Size
6.17775926 liters, 3L80, 228.6mm axle
250+ duration is going to run like hell under 3k add 11:1 onto that and you have close to my 388 91-93 octane only and idling/driving part throttle especially off road it's not going to be fun. That cam has such big duration to allow that high of a CR to run on pump gas even if it is premium and it isn't going to clean up until over 3k which isn't conducive to low rpm/small throttle inputs. Hed be better off in the 220-230 range and dropping a point of compression, so it has better manners at low RPM/light throttle input. It also will not have much vacuum for the brakes one pump maybe and bye bye power assist. That's why mine has Hydro boost.

Mine is a modern roller version of his cam 252 .600 110 vs his 250 .500 110 the duration and lobe sep will act just like mine just not as much lift. It hates anything under 3k.
I dont even think you read what posted or maybe misunderstood lol.

If the 76cc heads he owns are used off the crate on this 383 it will lower the compression. And I mentioned a new cam.
 

xm20k

Runs on 93 octane, caffeine, and spite
Supporting Member
Joined
May 26, 2025
Posts
1,138
Reaction score
2,927
Location
Girard, Ohio
First Name
David
Truck Year
78
Truck Model
c10
Engine Size
388
I dont even think you read what posted or maybe misunderstood lol.

If the 76cc heads he owns are used off the crate on this 383 it will lower the compression. And I mentioned a new cam.
My bad forgot he had the 76 cc heads and yes that would be the route I'd go add a summit roller for under 400 a set of link bar lifters and some pushrods all in around a 1-1.5k using the other heads and roller tip rockers off the current heads.

Sell the unused parts or trade for a dual plane intake and a 650-700 cfm carb.
 
Joined
Jul 20, 2021
Posts
953
Reaction score
3,483
Location
Tennessee
First Name
Matt
Truck Year
1979
Truck Model
C10
Engine Size
6.17775926 liters, 3L80, 228.6mm axle
My bad forgot he had the 76 cc heads and yes that would be the route I'd go add a summit roller for under 400 a set of link bar lifters and some pushrods all in around a 1-1.5k using the other heads and roller tip rockers off the current heads.

Sell the unused parts or trade for a dual plane intake and a 650-700 cfm carb.
880 block, wont even need link bar lifters. Just the dog bones, the spider and cam retainer plate from a factory setup.
 

Forum statistics

Threads
48,508
Posts
1,069,802
Members
42,989
Latest member
freebb
Top