1988 Sub with 400

[bigsub]

I have a 1988 suburban that I put a small block 400 in place of the 350 . The 400 has a 268 cam and the factory computer will not let the timing and the gas mixture get right , What can I do , Does anybody know someone that could help me with this problem ?

 

[bigsub]

help !!!!!!!!!!!!!

 

[sweetk30]

you need a chip for sure.

read here for info.

www.tbichips.com

or

www.thirdgen.org

 

[bigsub]

Thank you very much I didn't know that there was any one out there that did chips for tbi older stuff