i have a 1969 Xr7 cougar convertible shell i just picked up a 1969 351w that is being rebuilt with aftermarket heads and a mid range cam. my question is what would be the best transmission and rear-end combo for trips to L.A and Las vegas from the bay area ca. i plan on driving the car everyday and i want it to be reliable on the highway and street. i do not have a transmission yet so i wanted to know what would be the best one for the long trips. Fmx, C4,c6,4 speed,t5, i also heard i can use a AOD but from what year? all thoughts appreciated.