7A-FE Rebuild., Questions on rebuilding a 7A-FE. Options

[DeviousST]

I own a completly stock 94' Celica ST, with a ticking piston (at least that is the toyota master tech's opinion), that is engine threatening. Being the glutton for punishment that I am I have decided to rebuild and improve upon my base AT200 platform. I have all the aftermarket parts figured out, where to do the build, and the equipment to do the build, so here is my problem: How do I build a 7A-FE that will be reliable with about 7 pounds of boost. Do I just buy stock toyota pistons, connecting rods, and rings? (I want to stick with the original crank) And what about the heads. Will stronger valve springs with an otherwise stock valve train make my engine more resistant to boost and rpm? Internal Engine help would be greatly appreciated.