motor size
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 1
Likes: 0
From: Richelieu, Quebec, Canada
Car: Ford Explorer
Engine: 4.2litre
Transmission: automatic
motor size
I recently purchased a complete TPI drivetrain from a 1988 GTA which i want to use in restoring a 1987 Firebird. It has an automatic 7oor4 transmission and has 3.27 gears in the rear. I was told that the motor was a 350 (5.7 litre) and according to the spec sheets found on this site it looks like it is a 5.7 litre, however on the bellhousing it is stamped GM 5.0l. Do I have a 5.0 litre or did GMstamp some of their 5.7 litres with a 5.0 litre marking.
Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
sounds like you got a 305.. you could look up the casting number but it'll probably say its a 305 too.. if it really is stamped wrong the only way to actually tell would be to pull a head and measure the bore
Supreme Member
Joined: Mar 2002
Posts: 1,654
Likes: 2
From: Lower Salford, PA
Car: 1987 Camaro Z-28
Engine: 6.3L Victor EFI
Transmission: Tremec TKO 600
Axle/Gears: Moser 9"/4.11 Trac-Lok
The casting# on the crank will tell also. Try http://www.mortec.com to check casting #s.
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