[kwmech]

The exhaust system usually will hold up the engine enough. If I have to move the car/truck substantially I will either thread in a couple of long 3/8'' bolts into the lower bellhousing bolt holes and set a 2x2 across the frame rails or just use a heavy duty ratchet strap rail to rail. The early 4x4s with the engine stuffed into the firewall need the dist cap loosed so it doesn't get broken.

If you are not moving the truck then what you propose will work just fine and be relatively solid