Another question about wheel backspacing

[Zentelis]

There was a great info site posted some time ago detailing the different measurements of wheels and how backspacing affected things..

Does anyone happen to know what that site was? (I'm positive it was a Charger enthusiast who made it )

Anyway, for my '68 Charger, I'm planning on getting Wheel Vintiques 54 Magnum 500 wheels, 15x10 in the back, but I couldn't remember what backspacing I decided on! (5.5 or 5.0)
IIRC, I was planning on 295x50 BFGoodrich Radial T/A for the rear and 245's up front on 15x8 wheels.

I was basically mimicking a setup another member had, but of course I can't remember who that member was (If this setup looks similar to yours, lemme know )

I just got another new job, and I'm putting half my paycheck into the Charger 'cause I'm tired of not being able to do anything with it!

Thanks, guys!

[69chargerdad]

    these are 295 /  50  /  15    with 5 inch back space on a 69