5.0 or 5.7
05-18-2017, 04:24 PM
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Car: 1986 Pontiac Trans Am
Engine: 5.0
Transmission: 700R4
5.0 or 5.7
I'm wondering what the block number behind the driver head should say if the engine is a 5.7? I was told the original owner swapped a 350 but looks like it says GM 5.0LG
05-18-2017, 04:45 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Re: 5.0 or 5.7
Did you get the casting number from the other side of the engine?
I believe the last 3 digits of the casting number are also on the side of the block.
Not sure I've gotten reliable info on that 5.0/5.7 thing, but the casting number is a clear discriminator.
I believe the last 3 digits of the casting number are also on the side of the block.
Not sure I've gotten reliable info on that 5.0/5.7 thing, but the casting number is a clear discriminator.
05-18-2017, 05:06 PM
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Car: 1986 Pontiac Trans Am
Engine: 5.0
Transmission: 700R4
Re: 5.0 or 5.7
Is it in the same spot on the other side? I'll take a look tomorrow on the side
05-22-2017, 03:17 PM
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Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Re: 5.0 or 5.7
Says 5.0LG in the first picture, 5.7 would be stamped 5.7LG
Last edited by battman; 05-22-2017 at 03:23 PM.
05-25-2017, 01:09 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 5.0 or 5.7
There's not alottä ambiguity between a 0 and a 7.
Looks like a 305 to me.
Looks like a 305 to me.