96 Z28. I was wondering if anyone knew a good website on how to build custom turbo for my car(rear mount). Or if anyone could tell me tips and parts for building my own.

 

Search. This has been thoroughly discussed many times over. "STS" and "Rear Mount Turbo".

One word of caution - going Forced Induction is expensive (rebuilds espicially), espicially considering the lt1 does not like boost in stock form. 6psi is a max, and even then longevity of the motor hacked. If you want to build your own turbo system, feel free, but remember not to skimp on important parts.

 

Amen. Check these threads for your information:

DIY rear mount turbo

Piece together a rear mount turbo?