I love my 420/3spd setup with wardens plate adapter. 420s are easy to find, old junkyards, old schoolbuses, dumptrucks, etc...
IMO 420s are usually in better shape than 465s because when they were made (1950's-early sixties) people drove slower and took better care of stuff (smaller engines too). When 465s started showing up it they were putting 454s in front of them and a lot of folks just purely destroyed them trying to speed shift and such. But their are still good ones out there though, i have a few myself!!
