I am not quite following you, in your first post you say you want to lower it and put the 14 bolt in, now you are saying the 14 bolt is so low geared its buzzing like crazy. Is it in already or what? ( I have heard a lot of people putting Ford rearends in Scrubs but never the other way around)
2nd, it should have came with a 9" ford which is the best rearend out there and you can find a mutitude of gear ratios for it, why wouldn't you just stick with the 9" and put higher gears?

55 Vicky & customline
58 Rack Dump, 55 F350 yard truck, 57 F100
59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?