I have an 89 iroc-z i just recently took out the 305 TBI and put in a 350 TPI from an 88-89 trans am. When i trying bolting up the y pipe from the 305 to the 350 only one side bolts up. What can i do to fix this?

 

Get headers and matching y-pipe

 

is there a cheaper way? lol can i get a y pipe from a trans am? would it line up?

 

If you have the 350 exhaust manifolds, they did not use the EFE valve that the TBI used on the passenger side. Is that the side that won't bolt up?

TBI exhaust chokes a 305. You really should upgrade the whole exhaust system. '86-'89 TPI exhaust, whether 305 or 350, was the same, so it should bolt up, and it should be an improvement over the TBI exhaust.

 

the 305 TBI y pipe wont bolt up to the passanger exhaust manifold

 

Okay, again assuming you're talking about the 350 passenger side exhaust manifold.

Either get TPI exhaust, or put your coffee-stirrer-sized 305 exhaust manifold on.