Cragar on Jegs

With my tax returns, im investing in some new rims. Which bolt pattern, and backspacing do I need?! Ive been searching forever, and im sure theres more info on here, but im getting frustrated. So... Which one?

http://www.jegs.com/p/Cragar/Cragar-Black-Soft-8-397-Series-Wheel/754162/10002/-1

 

[PA99XploderSport]

These are what I was looking into....
http://www.summitracing.com/parts/CRR-3978812/