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Stoopid head/intake ?

Big Ray

Big Ray

The Older I Get, The Grumpier I Become!
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Hey ya'll


I was in the garage with the old motor from my ex's sub...IT WAS A 89 SUB.

I just noticed the motor is a flat tappet motor, but the intake (tbi) has the middle bolts more vertical like the then newer style....

What is the deal here....a one or two year style of head...?:dunno:
 
I think the cars were rollers at that time. Some truck blocks were FT only and some were the roller blocks with FT cams in them, I have a one peice rear main, roller cam, block at my parents place. it was from my first truck, so something special will be done with that one :D.

Im not sure what year they started with the roller cams in the trucks though. Ive had a couple vortec 350's apart and they were both roller cams, so 1996 at the latest maybe.
 
62 fat guy said:
cool

I was surprised that it was a flat tappet motor...I thought 87 up had roller cams?
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Nope.

I'm talking off of memory here so this could be wrong but I believe when they went to 1 piece rear main they made the block with provisions for a roller cam but didn't immediately start using a roller cam.

In general, truck motors didn't get roller cams until Vortec motors started in '96. LT1 and LT4 motors in the Camaros and Corvette's (and possibly others) got roller cams sooner than that.
 
Lol!

I don't feel so bad about my old 87 pickup sucking now!

I think I'm gonna stroke the old sub motor, maybe re-fit a roller into it.

383 roller, hmmmm :thinking:

Thanks ya'll!

-Ray
 
just had my 350 completely rebuilt, had the roller setup installed while it was being redone, i like it :D

Vortec in '96?
wonder why my '94 4.3 has Vortec stamped on the valve covers :D
 
4xcrazy said:
just had my 350 completely rebuilt, had the roller setup installed while it was being redone, i like it :D

Vortec in '96?
wonder why my '94 4.3 has Vortec stamped on the valve covers :D
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The 4.3 vortec stated in like 93 or so. IIrc there were some trucks that had factory roller cams in them before 96.
 
Intake bolt pattern changed starting in 1987 (4 center bolts at a different angle than the rest) when GM changed to center bolt valve covers.

Roller cams started in 1987 BUT only in cars, trucks never got a roller cam until the vortec V/8 came out in 1996.
 
4X4HIGH said:
Intake bolt pattern changed starting in 1987 (4 center bolts at a different angle than the rest) when GM changed to center bolt valve covers.

Roller cams started in 1987 BUT only in cars, trucks never got a roller cam until the vortec V/8 came out in 1996.
Click to expand...

I think I have learned more from this website in the last few years than I know what to do with it all. Best 25 bucks I spend all year.
 
38377k5 said:
Nope.

I'm talking off of memory here so this could be wrong but I believe when they went to 1 piece rear main they made the block with provisions for a roller cam but didn't immediately start using a roller cam.

In general, truck motors didn't get roller cams until Vortec motors started in '96. LT1 and LT4 motors in the Camaros and Corvette's (and possibly others) got roller cams sooner than that.
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Pretty sure Chris is right here, the bosses are there but they are not drilled or tapped for the spider.

I like him am going off of memory.
 
blazinzuk said:
Pretty sure Chris is right here, the bosses are there but they are not drilled or tapped for the spider.

I like him am going off of memory.
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I've seen my fair share of 87-later blocks and most have the bosses for the spider tray and a good portion of them are even drilled and tapped. Then there are also 87-later blocks that the bosses are there, drilled and tapped BUT the tops of the lifter bores aren't machined to accept the lifter cross bars. With that said the only way to know for sure is to pull the intake and see what the block in question has already been set-up with. It's easy enough to drill and tap the bosses but without some fixturing it won't be easy to machine the tops of the lifter bores to accept the cross bars.
 
Ah yes I knew there was some other thing just couldn't remember exactly what it was.

Only thing I knew for sure was the bosses for the spiders where there. I knew there was something else but just couldn't remember it.
 
sooo..on a roller cam'd block, the top of lifter bores are machined flat perpindicular to the lifter bore & has to be to work....i'm glad this came up, i have a 96 truck FT motor/roller block?(mounts for spider drilled and tapped) but not machined flat on top of lifter bores, that would of had me scratchin my head later when i try'n to go back w/roller cam..btw, whats a good match w/dz302 cam but rollerized? :)
 
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blazin_blazer said:
sooo..on a roller cam block, the top of lifter bores are machined flat perpindicular to the lifter bore & has to be to work....i'm glad this came up, i have a 96 truck FT motor/roller block?(mounts for spider drilled and tapped) but not machined flat on top of lifter bores, that would of had me scratchin my head later when i try'n to go back w/roller cam..btw, whats a good match w/dz302 cam but rollerized? :)
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Are you sure the block is from a 96 Vortec? ALL Vortec's are roller cam which would mean the tops of the lifter bores are machined flat.

Also, the DZ302 cam is a pretty wild SOLID lifter cam and you can't even begin to compare apples to oranges. What is the intended use for the vehicle, and would need to know what CR and what heads?
 
the motor may have been swapped at some point, it was in a 96 truck w/vortec fi, its just now being taken apart & w/holidays coming up not much will be done to it...as of such i haven't set any plans yet, other than to have it rev like a dz motor did..i've been told that the dz cam had more to do w/the way it rev'd more so than the short stroke did. i've also heard b/c of technology roller cams can rev faster than a FT cam from the word go, so i thought put 2 & 2 together..why not put the fast rev dz302 profile on a roller cam in that roller block..dz383 injected..mmmmm
 
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bronc3buster842001 said:
I think I have learned more from this website in the last few years than I know what to do with it all. Best 25 bucks I spend all year.
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You ain't alone there...


Question: Will a retrofit roller cam kit (ala comp cams) require the lifter bosses to be machined?

I have the spider bosses, I can tap those if they need it.
 
62 fat guy said:
Question: Will a retrofit roller cam kit (ala comp cams) require the lifter bosses to be machined?
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and its a good question. i'd like to know the answer to it myself. b/c, iirc, the retro roller cam *lifters are an inch or so taller b/c of the crossbars inhibiting rotation & dont need the spider at all
 
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