I want to upgrade my 48mm to 52mm, but there's a problem. The TPI engine I bought to put in my truck was from either an '88 T/A or an '89. How can I be sure if it's a '88 or '89? What's the diffrences between the throttle bodies?

 

i think it has something to do with the throttle cables

 

Yeah that's mostly what I tought... exept that is not helping me much cause the engine isn't in a F-Body. Anyone else knows?

 

The IAC passages are different as well...but it's been so long since mine was apart, I'm fuzzy on the differences.

 

Thanks for the info