My '53 has a T5 and a '68 GMC 4x4 Dana 44 limited slip with 3.54 gears. It will cruse 70-75 all day long and go faster than I want to drive it. The hardest part of swapping the rear end was getting the E-brke to work. I still need to redo that part. It's a matter of cutting and splicing some cables. Make sure you get a T5 with the Chevy bolt pattern and an S10 shifter/tail piece. I got an S10 with another bolt pattern. I had to make an adapter and carve on the tranny case some. I did however get one with a low first gear that comes in handy for hauling and climbing the steep hills on my road. It is sort of too low for regular use and second is barely too high though I do sometimes take off in 2nd. With a 4.11 or 3.70 rear end it would be perfect and still cruse around 70 mph.

"I wonder if God created man because he was disappointed in the monkey?" Mark Twain