tire size with c4 suspension

[ndeep]

I just purchased a front and rear suspension kit from flatout engineering, my donor vette is a 96. i do not plan on notching the rear frame rails. my first question is what tire and rim size/backspacing is every one using. i don't mind tubing it if necessary, oh yeah it is a 55 second series short bed. my second question is it seems most of you move the front forward approx 1.5 inches by reading all the other posts. thanks in advance for your help