The 2.0 and 2.2 heads are the same. It's the rocker assembly that is different. You can stick the 2.0 rocker assembly on the 2.2 head if you want to. Also, look around for '85-'87 Mazda 626's. The 8 valve head on those are the same once you rip them down to the bare head and have a machinest put a freeze plug in the rear coolant opening (the 626 upper radiator hose hooks to the "back" of the head, a freeze plug fills the hole when these heads are used on the trucks.) I was going to tell you that I have a couple I could sell you but the cost of buying/finding a good core, paying to have a machinest surface, valve grind, clean it, plus the new valve seals and then the price of shipping, you'd be in the $300 range. I found several on Ebay, ready to go in that price
range:http://cgi.ebay.com/ebaymotors/MAZDA-2-0-2-2-B2000-B2200-626-CYLINDER-HEAD-COMPLETE-_W0QQcmdZViewItemQQhashZitem25561977c6QQitemZ160358299590QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories I hope this info helps you out.