I think you will be surprised when you load an engine and trans in there and drive it around a little until the springs get "set". it could make all the difference. of course, a set of wheels and tires would also help. any idea of the diameter you will go with for tires? I have some 235/55r17's on mine. dan from pasadena has the same size on his truck. here is a link to his build. check page 108 for a pic with that size tire to see if you like it. those tires are 27.2" tall. I may end up with some 235/60r17's just for the extra height. it will affect the highway cruising rpm, and fuel mileage, a bit
http://67-72chevytrucks.com/vboard/s...63698&page=108
here is a link to a tire size chart with a visual comparison tab and several other tabs. maybe come in handy for you.
https://tiresize.com/comparison/