Update: SO... not very good milage so far. I got the weight down to 4200 from 5000 Lbs. 600 edelbrock milage carb, performer intake, electric fans, ramhorns with dual 2.5 exhaust. 5x14 air cleaner. Turbo mufflers. Same drivetrain. I think 3.73 gears would help because the vacuum drops pretty fast while driving most of the time like it's lugging. BUT it is what it is and it's a blast to drive. I really like it. I may try a different carb and maybe 3.73 gears later on. For now it's a daily driver. I use it mostly for an (auto upholstery) shop truck.
It's been super reliable. The 700r4 went out on my 90.... High gear clutch pack