Are there any differences between the 85 TPI intake and an 89 TPI intake (bolt pattern for the heads)?

 

Yes, both the intake bolt pattern for the center four bolts is at a different angle, and the '89 intake doesnt have the hole for the cold-start injector. Only 85-86 manifolds are the same. You can also use any aftermarket TPI intake such as from Edelbrock.

 

The reason I am asking is because I am looking into buying a engine from a guy that does not have center bolt heads but he was using the intake from an 85 TPI. Will I run into problems with putting my intake (89) on that engine or should I use his intake?

 

Yes, your intake has the four center bolts at a different angle than his 85 intake. Your intake will fit, but the four center bolts will not work. You could use his intake, or get an aftermarket TPI intake, as I said.

 

You could just angle the holes on the manifold using a drill and carbide bit....I did it with mine and it set in there fine