Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

350 from third gen to fourth gen

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Old Jun 2, 2008 | 09:00 AM
  #1  
alcamaroz28's Avatar
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350 from third gen to fourth gen

I have a 350 in my third gen right now, and i was woundering if i could put it into a fourth gen..... do they have same motor mounts?
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Old Jun 2, 2008 | 09:43 AM
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From: Allenhurst, GA
Car: '81 Z-28
Engine: Soon to be a 383
Transmission: Muncie
Axle/Gears: 3.42
Re: 350 from third gen to fourth gen

If it is a LT1 car then yes, motor mounts and bellhousing are the same. Ls1 is completely different though. Either way it will need the wiring done.
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Old Jun 2, 2008 | 10:09 AM
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: 350 from third gen to fourth gen

why? Its like going backwards.

LT1's are better than TPI, just as LS1 is better than LT1. Though the difference between an LT1 and a L98 isn't that great in terms of technology there are still several advantages to them, higher flowing heads, an intake that only needs porting, sequential ignition instead of batch fire.

LS1 > TPI any day of the week, if you can pick up a LS1 cheap to swap it its worth every penny over a gen I/II sbc.

_________________

If you happen to have a V6 4th gen just find a LT1 and drivetrain, they are extremely cheap right now. 265hp+ in stock form and you can probably pick up an entire swap for under $1400 for an auto.
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Old Jun 2, 2008 | 11:18 AM
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naf
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: 350 from third gen to fourth gen

I've always assumed, and been told, that the distributor of a Gen I wouldn't clear the cowl of a fourth gen?
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Old Jun 2, 2008 | 11:40 AM
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Thirdgen89GTA's Avatar
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: 350 from third gen to fourth gen

A small cap distributor should fit, but I wouldn't exactly want to try and put plug wires on it, very tight fit.
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Old Jun 3, 2008 | 02:32 AM
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 350 from third gen to fourth gen

A TPI intake will not clear a 4th gens cowl and hood. I dont know about the distributor and/or a carb setup.
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Old Jun 3, 2008 | 04:16 PM
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From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Re: 350 from third gen to fourth gen

The mounts are different, you need a Gen 1 swap tubular crossmember.

The distributor is gonna be a pain, accessory fitment, you could likely use an LT1 bracket and accessories with an electric water pump.

The real question is why would you make such a stupid move

1. 4th gen weighs more, slower at same power level.
2. 4th gen is much much harder to work on, the engine bay was just about built around the engine.
3. They are readily available with an engine that likely puts out more power than what you've got.
4. They never came carb'd, and you've prob got a carb'd engine, so you'll have to do a bunch of work in the fuel delivery department also.
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Old Jun 3, 2008 | 09:08 PM
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Re: 350 from third gen to fourth gen

thanks ... i just stared to like the body of the fourth gens and i didnt want to leave the engine i rebulit in my '84 .... about 500 HP and a hell of a lot of torque
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