[SunSoaked]

I just put a 14bolt under my 69. I used a u-bolt "flip kit" from ORD that puts the u-bolt threaded end "up" instead of down. It swaps the square ubolts for the round ones. The important thing in your case is the u bolt plate has a long notch in it instead of just a hole in the center. This allows you to move the axle fwd or back about an inch. You should get it where you want it before you get the driveshaft made just in case it comes up a little short. The pumpkin is larger on the 14 so you should be ok. I hope I didn't confuse you. Maybe some of the "experts" on here have a better way. Here's some photos of what I'm talking about.