Dogface,
Yep, I knew what engine you have - a 216 was commented-on, so I thought you should let folks know. I am looking forward to seeing your driving report.
Sorry, I did not mention that 4.11 to 3.9 option (of course, Dave is correct - thanks for the correction).
That ~9% gain from going from 4.11 to 3.9 is about what I got going from 3.9 to 4.11 (my only option). I gained about the same % by switching to 16" high profile radial tires.
You'd need the 1954 3.90's ring-gear carrier. I'll give you a 3.90 R&P and carrier for the cost of shipping, but I'd recommend going all the way to 3.55.
