90' 454 out of a one ton pick up

[t72ss402]

Does anyone have the ratinds for these engines? What year did chevy start to come out with the roller cam in there big block? Any info would be grateful

[strangler]

Roller cam came out in 96 or 97 with the 'vortec' stuff (L29). Vortec engines have steel cranks, 4 bolt, forged rods and steel roller cams. No provisions for a mechanical fuel pump though. I dont know much about the tbi motors, but I think they are all cast componet 2 bolts. Both have non-adjustable valvetrains.

[EFI69Cam]

Roller cam came out in 96 or 97 with the 'vortec' stuff (L29). Vortec engines have steel cranks, 4 bolt, forged rods and steel roller cams. No provisions for a mechanical fuel pump though. I dont know much about the tbi motors, but I think they are all cast componet 2 bolts. Both have non-adjustable valvetrains.

The 98 or 99 L29 I just took apart had a cast crank and 3/8" bolt rods. Did have a factory roller cam.

[sparky427]

The 88 -91 454's are all four bolt main with cast cranks and factory 3/8 bolts in the rods. They are still using the old two piece rear main seal. About mid way through 91 they changed over to the Gen 5 big block with a one piece rear main seal, cast crank, flat tappet cam, four bolt main, and changed the coolant passages in the heads. In 96 you get the Gen 6 with factory roller cam, four bolt main, revised oiling system, better heads, cast crank, stock 3/8 rod bolts, and they changed the coolant passages in the block for one last time. Where in Texas are you at? Hope this helps.

sparky427

[t72ss402]

Thanks for all your information. I mainly bought the truck for the sepintine belt system for my 72 chevelle. but i think that i am going to drive the truck for a little bit.

i am in Ingleside Tx.

[strangler]

The 98 or 99 L29 I just took apart had a cast crank and 3/8" bolt rods. Did have a factory roller cam.

Just rebuilt my 97 and it was a steel crank, with little rod bolts (3/8)

GMC 2500