OBS 5.7 TBI upgrade ideas?

That would be smart. Start smaller get Exhaust somethings you like and build your way up.

After searching i havnt seen much for 5.7L TBI
 
Buy yourself an engine stand and a motor to put on it. Buy things here and there when you can afford them. Then bolt them all on at once and swap new motor in.

Depends on whats most important to you - go fast or go high?