My '65 Nova wagon is about 3,000 lbs and is powered by a 230ci inliner. I use a Powerglide with a converter built with a 3600 rpm stall. It seems to work great with my 4.10 rear gears and 23 inch slicks. I leave the line at 3,600 rpm, shift into Drive at 6,000 rpm, and go through the traps at about 5000. The car pulls hard off the line and is very consistent.
