yes, you need the 392 "center sump" pan which is a 360 pan, number stamped on the bottom in big letters, cant miss it). the front sump is ~8" long and starts ~4" back from a vertical plumb line straight down from the very front of the pan lip. it uses a specific pickup with a sharp bend in the middle (I think pics are on my old computer but I will check for you). hold the 64-66 A body 273 mts up to the 360 block & you will see on the one side (I forget which side) where you just weld a simple triangular ear to the mt so you can use a 3rd bolt cuz you need (3) thru bolts on each side/mt. (other mt is fine as is). 273 V8 ex manis fit but are VERY restricted (1&7/8 outlet). Score some 92/early 93 magnum ex manifolds which have a 2&5/16 outlet (later ones look identical but have the same 1&7/8 outlets as the 273 manis do). the good ones might run you 100-150. the DR side one might need slight column mods (early A tolerances are the worst) but they are my faves. definitely go with the 904. Holler if you need more info.