Will Rebuild solve my problems?

[RoushRacing6N17]

I have an 88 with the original motor in it. I want to mildly build the motor but i feel that the bottom end needs to be redone first. I have bad low oil pressure and the motor burns a little oil too. Will getting that summit rebuild that uses the speedpro pistons(know the one i'm talking about?) fix these problems and give me a strong enough bottom end to get say 350hp at the flywheel? Also at what hp and tq would you suggest going from hyper pistons to forged pistons? Or do I already need forged pistons? thanks for the info, i am kind of lost right now.