Built out of 2x4 for a trans/clutch swap. Worked great. When done I put two side by side and made a flat top out of 2x4 and we use it as a sitting bench in the garage.
Another vote for cribbing, you can even put under a flat part of the frame rail, these tings are solid. You can make however tall you want too.
Here's mine:
I've got a 3/8 Ingersoll Rand prototype/test impact ratchet in good working condition. Was given to me to test on the field, never experienced any failures. No use for it anymore so I figured someone else can use it. $150 shipped.
When a forum becomes to "commercialized" I'm out. That's what drew me towards sticking around here. I love to chat with "real" people with unbiased opinions.