Easy to find great block material with the new house building going on all over. The big beams spanning garage doors always have to be cut to length. The cut ends usually end in the dumpster. Got mine from new house next door. Cut square, attach a knob to side for ease of handling. My driveway while on a flat lot has enough drop to it so the rear leveler feet just touch and the front are fully extended on top of 2 blocks 3 1/2" each.
Rexhall T-Rex Aerbus 36' May/2004 build
8.1 Vortec 5 spd Allison