72 c10 with an ECE 3 1/2 5 drop

[Riverdog57]

I have a 72 c10 that I am building . I have the frame blasted and powder coated with a new 3 1/2 x 5 ECE lowering kit and Wilwood brakes I need to get wheels and tires so I can roll it around . I want Torq thrust vn215's in the old catalog from ECE they have a picture of a 68 long bed that they have 255-60-17 with 8 wide rims in the front and 275-60-17 with 8 inch wide rims in the rear this looks like what I want . Looking for some one that is running this setup . I'm trying to find out what back spacing they are running . I think American has these wheels in two back spacing available a 5.050 and a 4.070 any help would apricated. I do not have the cab or bed on yet . Thanks