A $10.99 harbor freight furniture dolly (1,000 lb. capacity) and some scrap wood screwed to it works for me. Have several complete engines in the shop on them so I can move them around easily. They don't roll real good, but good enough.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax