i am doing a disc brake conversion on my 74 valiant and obviously the fronts are now 5 x 4.5 for the bolt pattern. my question is will a 74 thru ? a-body or volare/aspen that came stock with disc brakes have 14" steel wheels with the 5 x 4.5 pattern?

All A/F/M/J bodies after Jan 1976 came with mandatory disc brakes...so aspen/volares will have your wheels... when getting them off the 1973-1976 A-bodies they will have to be equipped with disc brakes for the 'large bolt pattern' (aka 5 lugs on 4.5")... if you need larger rims or a wider selection then the B/C bodies would also have 14-15" rims in the LBP depending on the options (which means if you get lucky and find a 1975 New Yorker with it's road rallyes on it they'll be 15x6" LBP rims...)

-D.Idiot

thank you that helps me a great deal.