If you want something a little different (but more expensive...) One of the easiest swaps I ever put under a 34 Ford was a 64-67 Corvette independent rear axle. Later years may be the same, but this is what I used. Other than welding a mounting plate for the pumpkin onto the stock rear crossmember and fabricating two brackets for the trailing arms to bolt to the frame rails, it was a bolt in swap!! The only thing I wouldnt do again is chroming the half shafts and braces.....hated crawling under the car all the time to polish it!