904 converter question

Fish, I appreciate ya info bout tha lil tranny...Sumbody locally told me sumpth'in about tha 500(updated 904)...I'm gunna look for one to see juss how much I have to alter my tunnel...I have a 1966 Dart wagon, and it juss went thru about a 4 yeer build, so I ain't reely want'in to start cut'in it agin!!...Altho I am debate'in whuther to cut a 8 3/4 rear for it...I would have to rebulid tubs, and that would screw up my rear seat stuff...I still have tha small lug pattern, and have a cherry set ov aluminium slots(ansen's)...I have tha 7" wide ones on back now, but reely like to use tha 10" ones I have...All tha wheels are 14" diam tho...Maybe I should juss drop tha 360(approx 380HP) in it, and put on sum tall 15" tirez...wit them 2:76 geers, dat oughtta be a good OD!!!...:-)