That is heavier than I would have guessitmated
I have weighed several of my cars on a set of commercial 1000 lbs. platform scales with one scale under each tire with and without me in the cars. Youur hot rod is good on the side to side weight without the driver
Maybe it is time to add some more fuel to get more weight for traction on the rear tires
Is the battery in the bed area?
If not maybe installing it at the right rear of the bed underneath it at the farthest back you can get it might help on weight distribution also