I'm pretty sure the '89 - '92 SOHC Galant heads are 8-valve. I know that a 2.4L head can be used on the 2.0L block, and I'm wondering if the 1.8L head for the 4G93 might, although I think not. I have a 4G93 in a Summit, and it has perceptibly more power than an 8V 2.0L.