Thanks for the replies fellas.
As Chris stated, really no need to throw the pulling rear into the drag/dyno mix unless one of those SQHD's or whatever operates at a much higher efficiency level.
I just happen to know where there is a pretty good pulling set up setting out in the stacker trailer. Surely Craig wouldn't mind if I borrowed the rear end for a weekend.
The Rudy's Diesel truck was running a 9" or 9.5" ford.