67 camaro backspacing question

[ArisESQ]

ok guys, i promise this is the last time i ask this. im ordering my wheels this week, and i just wanna make sure that i dont blow all my cash on somethig that wont work.

ive measured about 6 times by now just to make sure everything fits, and i think i finally have it:

17x10 with 5.75 inches back
17x8 with 4.5 inches back

if someone could just double check on the FRONT backspacing for me, i would greatly appreciate it... also, does anyone know if its possible to fit a 17x8.5 in the front? or maybe what backspacing i would need?

thanks again everyone!