The 727 wont clear the pinch weld in the trans tunnel without some massaging. as for the trans, my 66 was column and now its cable/on the floor via B&M kit and a kilduff lightning rod shifter. the factory 273 manifolds will choke out the large port 360 heads something fierce on the drivers side, I used a 74 valiant 360 manifold, clears with a u-joint style coupler on the steering column. win-win - no more p.o.s. pot style coupler, and clearance! as for a driveshaft, I had mine built. It was less expensive and more timely than finding an O.E. unit. The oil pan will require some clearancing on the drivers side where the drag-link sits. it will hit the pan at full left lock. you will need a 90 degree oil filter adapter as well, either from a later A/F/M/J body to ease the pain of changing the oil, or, do a remote mount setup. the slant radiator will work ok, but Id recommend upgrading, too much cooling is better than not enough.