Put the money in a Dana60. In 1992 when i bought my 64 Savoy the 8-3/4 lasted 3 races( chucked all the teeth off the ring gear) Got a truck Dana and used the axles, ends and brakes, bought used 4.88 gears and spool, got maybe $400 bucks in it. Cover has not been off since, guess I should check the oil this year.