Quote Originally Posted by John Palmer
I have an 8" in my 32 roadster with "the usual street rod" 350 engine, and 350 (non O/D) transmission. The rear tires are 30" tall. It has an open diff with a stock 2.78 gear. I'm getting ready to tear the car completely apart for paint and really want to upgrade the differential to a limited slip with a 3.55 or 3.80 gear for a little more guts off the line. Just can't decide which one would be the better all around choice.

But, as the price of gas continues to raise my "Bonneville Gear" is looking better, LOL.
With the 2.79 gears and the 30" tires, it will need some "adjustment" in the final drive selection. I went from the 2.79's to 3.40's (along with a few engine mods to a .030 over 351W) but the seat of the pants feel was mega different. I have a 9" in my latest with the 3.25 gear set and a spare set of 3.70's. I got the 3.70's out today to see what it needed to sell it - a crush sleeve after changing the yokes around. Then got to thinking - 30" tall tires, + 3.25 equals not much off the line, so, we'll see if the 3.70 punkin goes on the block or not .