I just bought an 86 IROC parts car. It has a tuned port motor, with the VIN digit "F", indicating the 5.0 TPI motor. The guy told me that it was rebuilt, and is a 5.7. How am I supposed to tell? Any ideas? Thanks.

 

Get the casting number off the driver side rear of the block, right where the trans bolts up. (look behind the dr. side valve cover)

Then go to www.mortec.com That will show you what you have.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited October 01, 2000).]

 

Also, on the drivers side rear of the block, a lot of later models have a "5.7" or "5.0" cast into them. If it is dirty, you may have a hard time readiing it. It is also hard to get a good view.