The rocky runs an 8" A-1 with 5300 stall with a 2700 pound 414" SB with 4.10 gears and doessn't really slip much at all above 30-35. from my experience I think weight has more to do with converter street drivability than any other one factor.

WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0