please just delete this and send me in the right direction through a pm if this is a repeated post, but i did a search and could not find an answer...

can i use an LT1 throttle body on my TPI? and is it an improvement or is the LT1 a 48mm TB also?... thanks for any help and i apologize if this is an inconvenience for anyone

 

Stock TB on an LT1 is 48mm also...don't think you would gain anything from doing the swap. We usually go to a 52mm TB...bore out the stocker and what not as the 58 tends to be a bit much unless you have serious head/intake/exhaust work to flow that much.

 

thanks so much thats exactly the info i was lookin for

 

Also the LT1 throttle cam is completely different (still works)

The bottom vacuum port is missing on LTx TBs and the TPS/IAC connectors are the newer style