1988 Chevy 3500 cam?

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1988 Chevy 3500 cam?

Postby nelson on Thu Nov 07, 2013 10:25 pm

I just recently acquired an 88 Chevy 3500 with the 350/5.7 engine and have a few questions. I have yet to really mess with it but it does need some engine work. Would this truck have the hydraulic roller cam or not? It is fuel injected and turbo 400 trans. Short of pulling the intake and tbi is there a way to determine if it is roller or not? What should I look for? Also is that the one piece rear main setup in 1988? Lots of questions. Lol. Thanks for the help
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Re: 1988 Chevy 3500 cam?

Postby amcamx on Fri Nov 08, 2013 7:37 am

Looks like full main seal, with flat tappet cam, if it is the original motor.
Depending on the casting number, the block may or may not, be roller cam ready.
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Re: 1988 Chevy 3500 cam?

Postby amcamx on Fri Nov 08, 2013 7:49 am

The casting numbers here are for production blocks manufactured from 1986 to the end of GenI/GenII production.

For 350 flat tappet blocks look for casting number 10054727, 14079287, 14088548, and 14101148.

Roller blocks are more complicated because even though the casting number indicates the block is provisioned for a roller cam, it doesn't for sure mean the block has a roller cam. But if so provisioned, a factory roller cam can be installed to one of these even if it currently has a flat tappet cam. For 350 roller tappet blocks look for casting numbers 10243880,14011148, 14088526, and 14093638 these can be a 2 or 4 bolt block. The 880 is the Vortec block it appears in mid 1995 production with swirl port heads and TBI and may have a flat tappet cam but is fully provisioned for a roller in all instances. It appears again in some 1996, 49 state vehicles with Vortec heads and TBI.

A problem you could encounter when hunting the wrecking yards and rebuilders is that there is a flat tappet block and a roller that both end with the numbers 148. 14101148 is a flat tappet truck block, 14011148 is a roller provisioned block.
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Re: 1988 Chevy 3500 cam?

Postby nelson on Fri Nov 08, 2013 8:52 am

Thanks. Will check the casting number tonite
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Re: 1988 Chevy 3500 cam?

Postby nelson on Wed Nov 20, 2013 11:01 pm

I have a burnt valve in the heads and was going to put some vortecs on it. Is there an adapter to put the factory tbi on a performer intake or would I be better off just putting a carb on it.
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Re: 1988 Chevy 3500 cam?

Postby hoggieman racing on Fri Nov 22, 2013 7:06 am

There is an Edelbrock intake to put TBI on, dont know about a spacer to mount TBI on a carbed intake. I do have a 727 rebuilder shortblock, 1 piece seal, it is a flat tappet without provisions for a roller.
Image BIG BLOCKS
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Re: 1988 Chevy 3500 cam?

Postby nelson on Fri Nov 22, 2013 11:14 pm

Thanks for the info. I haven't been able to get the numbers on mine. Its just greasy enough that I can't make them out. I am debating on putting a carb on it and doing away with the tbi or I have a lathe and milling equipment and might just make a tbi adapter in aluminum. Any thoughts?
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