bolt pattern & wheels for 68 383 Cuda???

centerline also makes wheels for the small bolt pattern. as for the small bolt pattern being strong enuff for 425 hourse ...yes without a doubt. the only reason to change to the larger bolt pattern is for selection of wheels. Until you top 500+ hp the small bp will survive

the cheap way to go to large pattern is to re drill the hubs the best way is to upgrade the brakes and buy new rear axles