I put a malibu rear end in my 37 so its 5 lug.....
...but you could have machine shop redrill pattern
5 lugs are a 4.75" (chevy) or 4.5"(Ford) while the 6 lug is 5.5". I don't think there's enough surface area on my 5x4.75" axles to redrill a larger diameter pattern.
