Wheel Size Question.

Kind of doing it in reverse order. You need to make your mods first. Obviously you will not be using the stock brakes front or rear so the bolt pattern is moot. It will now be the standard pattern. 5 on 4 1/2. so wheels selection will be unlimited. Cragar S/S is not a performance wheel. Maybe in the sixties/seventies but that was before radial tires and ultra low profile tire were made. The suspension is a combination of the control arms, shocks, tires, wheels etc... You need to plan out the total combination from the start.
Like buying a cam and not knowing what induction, exhaust gearing, weight etc...you are building for.

I can see what you are saying Mopar Leo because I can see clearly because I don't smoke a lot of pot while I'm at work in a California weed shop.

You are saying plan your suspension to reach your goal, do it once and save your money. I see a lot of guys throwing 15" cop car rims on their car, then another set of maybe 16" or 17" rims but it was never really the 18" rims they wanted to begin with that fit the brake package you wanted to begin with. I get ya, and I agree. It saves you money in the long run.

But reading posts on here most people will answer the same question over and over and over... "Will 15" x 6" rims fit on my car?"

The most important thing is to do what you want with your car and have fun and reach