4g64 bottom end is "indestructable" so, beyond maybe lowering the compression and/or new rings, I'd leave it alone. Maybe getting the crank cryotreated and straightened, but yeah, it's good. You'd profit most from head work. Personally, I'd stick with the SOHC head just for the sake of being diffrent. With a DOHC head people are likely to just assume it's a 4g63 and we can't have that now can we? The SOHC is going to have just as good a flow as the DOHC. you just don't get to play with the timing as much. So, as long as you're in there I'd say do all the stuff you can afford to do, and especially do the more internal stuff like pistons and what not. dropping a cam in later is no big deal, but doing head work requires the head to be in the machine shop for a couple of weeks. Does that all make sense?
Bookmarks