The 360 fits in the 66's just like the original 273's did but you'll need a list of parts all from a v-8 car. Here's a partial list of things that are different or need to be upgraded for v-8 power;
K member,radiator,wiring harness,transmission, driveshaft,rear end. This list will get the conversation started. More members will chime in with their expertise. (time for work) tmm