does anybody know what the differance between a lt1 style throttle body and a l98, 89-92 throttle body. I can get a good deal on a lt1 throttle body and i need one for a l98 with a holley stealth ram. does anyone know if the iac and tps are the same? any other reasons why i couldn't use one? thanks for any help.

 

same Throttle Body

 

They are different in that they have a different TPS sensor (though you could just put a different connector on your harness and use it just fine)... The LT1 throttle bodies also have a different throttle cable mounting setup.. Oh, and if you don't get a 1993 LT1 throttle body, you also won't have a spot for a TV cable for the 700R4.. They do bolt up and have the same size bores though.

I'd say in your case you could probably get the LT1 one to work..

 

Except that the LT1 TB has a fixed TPS, and his '89 TPI should have an adjustable TPS.

 

Indeed...And unlike the later TPI throttle bodies that you can use the adjustable sensor instead of the fixed one, the LT1 doesn't have any other options..