Maybe it's just me, but that seems hard to justify when you can find entire engines for less than $400. I bought another engine this month when the timing chain in my '91 slipped and the intake valves bent. I've now got a damaged head and serviceable bottom end sitting in my garage. Not sure what to do with it… Once you repair the head and timing chain components (chain, sprockets, etc.) you're into it for a grand, easy.