'how to judge quality?' - in most cases, Price!
My best - is an 'Ing's' (spelling?) I got from a truck shop auction many years ago. Square tube bottom, 4 large casters, 3X3 rear upright with a gear reduction rotator on it! It will hold a Cummins NTC 350 with no problem - been-there-done-that.
It's holding a BB right now and isn't breaking a sweat!
Paid under $100.oo at auction - they sold for $300~400 new. One of the best shop investments I ever made.
My worse is a cheapy 'Speed-Shops' (remember them!) special. Think it cost @$20.oo - and it works and looks like it. It drooped with my daughter's 1.5L 4-popper on it. I use it to hold bare blocks while I clean and paint them usually - then move the block to a better stand to assemble.
The others are pretty good bought or home builds that fill the need. They all have pivot retaining devices and if not square bases they have an added front cross-bar like the one in your link to held prevent tipping. Several have Chevy pattern mounts only (helps me get out of helping my wayward Furd friends
) and the others are adjustable.
Follow all the info givin in the other replies and buy the best one you can afford - then rent it to your friends when your not using it to regain your investment - worked for me! [img]graemlins/thumbsup.gif[/img]
Oh - and paint it "Chevy Orange" as soon as you get it!