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Engine combatibility late 90s 350

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Old Aug 30, 2008 | 06:57 PM
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From: Hurricane, WV
Car: 01 Z28 and 89 Iroc
Engine: ls1 fti 3600,S60 w/3:73 gears
Transmission: A4
Axle/Gears: 3:23
Engine combatibility late 90s 350

Would a late 90s (1999) 350 out of a chevy truck be combatable with Gen 1 heads and stuff? The seller says everything is the same. No casting numbers. I just wanted to make sure before I picked it up. When looking through parts books, most gen 1 heads are dated up to 95. Then again, vortecs heads were late 90s.
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Old Aug 30, 2008 | 07:02 PM
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From: Estes Park, Co.
Car: 88 Trans Am
Engine: 355 c.i.
Transmission: 5 spd.
Axle/Gears: 3:42s
Re: Engine combatibility late 90s 350

Yes your gen 1 heads will work, but you will have to use your gen 1 intake also.
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Old Aug 30, 2008 | 07:02 PM
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From: Hurricane, WV
Car: 01 Z28 and 89 Iroc
Engine: ls1 fti 3600,S60 w/3:73 gears
Transmission: A4
Axle/Gears: 3:23
Re: Engine combatibility late 90s 350

My apologies, this seems to answer my question.

https://www.thirdgen.org/forums/tpi/...light=1999+350
----------
Originally Posted by rosco88ta
Yes your gen 1 heads will work, but you will have to use your gen 1 intake also.
Yeah, that's what I intend to do. Thanks.

Last edited by IROC315; Aug 30, 2008 at 07:03 PM. Reason: Automerged Doublepost
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Old Aug 31, 2008 | 12:55 PM
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From: Hurricane, WV
Car: 01 Z28 and 89 Iroc
Engine: ls1 fti 3600,S60 w/3:73 gears
Transmission: A4
Axle/Gears: 3:23
Re: Engine combatibility late 90s 350

What about cams, lifters and timing chains?
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Old Aug 31, 2008 | 01:54 PM
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From: Estes Park, Co.
Car: 88 Trans Am
Engine: 355 c.i.
Transmission: 5 spd.
Axle/Gears: 3:42s
Re: Engine combatibility late 90s 350

I guess it depends on whether it's a vortec motor or not. I believe if it is a vortec motor it will have hyd.roller cam and lifters. I think you can replace them with a hyd. flat tappet cam but not real sure. I'll step aside and let someone else confirm that. Vortec heads are a good head but in stock form you are limited on your valve lift to .470-.480 something like that.
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Old Aug 31, 2008 | 02:25 PM
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From: Hurricane, WV
Car: 01 Z28 and 89 Iroc
Engine: ls1 fti 3600,S60 w/3:73 gears
Transmission: A4
Axle/Gears: 3:23
Re: Engine combatibility late 90s 350

It's just a shortblock. No heads, cam or anything included. It does include the spider stuff for the roller lifters. I am wanting to buy it, throw RHS Vortecs, performer rpm, holley 750 and a comp xtreme 274 (I think) roller version in and go.

I was just a little unsure if the the cams were different or something. Summit lists most of the cams going from 87-95.
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Old Aug 31, 2008 | 02:36 PM
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From: Estes Park, Co.
Car: 88 Trans Am
Engine: 355 c.i.
Transmission: 5 spd.
Axle/Gears: 3:42s
Re: Engine combatibility late 90s 350

How many miles on the shortblock? Are you going to go through the shortblock to freshen it up? Sounds like your on the right track. But I would get the block casting #, and find out what pistons you have in it for your compression ratio and such.
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Old Aug 31, 2008 | 06:05 PM
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From: Hurricane, WV
Car: 01 Z28 and 89 Iroc
Engine: ls1 fti 3600,S60 w/3:73 gears
Transmission: A4
Axle/Gears: 3:23
Re: Engine combatibility late 90s 350

He says it has 66k on it. I was going to clean it up.
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