Cheap Crockpot
I picked up my Crockpot at Wally World (WalMart) for $9.99. This method really does work best. Just remember that antifreeze is highly toxic so don't leave it where it is accessible to pets! I made a cage out of an old candy can with holes drilled in the bottom. Dump the parts in the can and lower into the antifreeze. This makes it really easy to retrieve your "new" engine!
BTW: I heartily recommend disassembling your engine first. It allows you to properly rinse, dry, and lubricate all parts after cleaning . . . very important to your engine's health.
. . . Bill