Weld Rim Sizing

[AKcobra]

Looking at getting some Welds and need help with some sizing and backspacing.

Wanting
17x8 in the front
15x10 in the rear (IRS)

S77B model

Any ideas on backspacing/array. I know some people have had to cut/grind. I don't mind doing that.

Thanks

 

[Wicked46]

Not sure on the fronts... You will need a 6.5" BS on the rear wheels.

 

[blkGT500nCA]

Weld can't tell you what you need?