Bet I know what U'll are thinking this would be so much easier just going back in time walking up to the parts counter of Ur large Oldsmobile Dealership and just order the part & WALA!! here comes parts guy with exactly what We need. For my case 1969 is best by that time 1964 442 parts would be plentiful (not obsolete or phasing out yet) & I could get what I want for my 1969 Hurst Oldsmobile just as simple as that. Awwwww! To dream!!!!!