reply to tclederman
I changed the rear end to 3:55 and it made a big difference.
But, there must be something else missing because there is no way I could go highway speeds.
Spring is almost here and I hope to have the truck on the road this year (for sure this time) and I will be able to give him a real run and see he'll do.
Also, yes that was a typo - meant to say 29 mph not mpg. Sorry if I confused.