[bobH]

I would second the opinion of JSeery, post 7.... I've got 3.54's in a 47 convert (tank), and it's a slug off the line. I can only imagine what 3.25's would be like. My choice would also be something like 3.78 (or even 4.11) and an overdrive, if I wanted highway gears. Just opinion...

As for the 'good-gears / bad-gears' question, probably not much choice. I have seen postings on this forum that 'fitment' of new gears can be problematic. With original Ford gears from the old-days, fitment was (and is) fairly straightforward. What do you do when you find that you need to adjust the pinion with homemade shims, and maybe even move it in the direction that you can't? And, you won't even know of this problem until you are actually trying to do it. All I'm saying is, I can't help with the good-gear, bad-gear question, and I would have a plan for 'abnormal' fitting and adjustment. Not saying you can't do it, just be aware.