engine build questions

ok engine guys, im getting ready to tear into my engine, im putting gt-40 heads, cobra upper and lower intake and a new cam (plus all the other bolt on stuff that goes with it, injectors, tb, maf...etc) im not planning on re-building the sortblock unless i have to, my question is, do i need to get new bolts for everything??? if so, would i be better off to go with studs as im probly gonna have to re-build the engine in a few years, and also, can new bolts be re-used if i go that route??? and help/tips for this build would be great, thanks
 
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