it (20R head on 22R block) does make a good bit more power, but if your engine is running fine just hang on to the 20R head for later on down the road when maybe you blow a headgasket
and you should have kept the alternator that matched the 80 truck wiring
:flipoff: i wasnt wrong!
and about the head swap...I wouldnt swap it til you need to like Glen said
