Since my '82 Rampage with its '89 LeBaron 2.5 TII is a GRM Challenge car- and will be remaining so until at least next year's competition- I'm always on the lookout for relatively inexpensive upgrades and even just replacement parts. As such, I figured it would be good to know what heads I should be looking out for to be able to grab as potential replacements/ones I can work on porting to swap in down the line. Is there a good primer/guide on the different heads between the 2.2/2.5 engines, and/or if there are other engines that the heads will work off of (since the older cars are getting more difficult to find in junkyards...)? Thanks!