Rebuilding Type IV, what to expect?

Heya all, I posted a while back about when VW used the Type IV. Now I've obtained a fried T4 from a '77 Bus for no cost. I hope to rebuild and convert it for use in my '73 baja. Word has it that the engine went out after the owner's daughter pulled "The Grapevine," a hairy grade here in California in third gear. Pending the actual delivery of the engine, I've yet been able to take a look to see if there is anything as obvious or as simple as a broken valve spring or such. I've never rebuilt an engine, but am pretty mechanically apt anough to follow directions and use common sense when working on something new. Where should I start with this engine? If the gal lugged the engine up the hill, I would assume the engine went out due to overheating problems. What should I assume went wrong with this engine? I appreciate any advice I can get. Thanks, Wes