I've got one from harbor freight, 4 wheel version. I suggest get a good one, go ahead and spend a few bucks to get one that can handle a good amount of weight. Better to be safe than have a fistful of dollars. I wish I'd got the one that folds up like an engine hoist does to save space.
Side note: what are you doing to the 3.7 and what did it come out of?
X2 buy a 4 leg stand, the 3 leg stands just don't feel as stable when you roll the engine across the shop or trying to roll it over. I bought my stand from harbor freight as well. i have built 2 5.0 mustang engines and done countless cylinder heads at work with it never had a hiccup, good stand!!
I have had the above for quite a while now, rebuilt multiple engines from KA24de's to Small block 350's and it is showing no signs of sag or wear at all.