Clean the engine up a bit, turbo the sohc and have fun with it! The sohc is getting a lot more love lately especially from JGS Precision,
http://www.jgstools.com/turbo/ka24et.html
People don't give the sohc engine it's due. It's easy to work on, the oil pump is on the outside of the engine, emissions stuff comes off easy, aftermarket pistons from dohc engines work in it at 1 point lower compression (8:1 instead of 9:1, perfect for turbo), changing cams costs half the price because you have half the number of cams and the list goes on.