350 vs 366 performance?

[Cdaddy731]

Here's the deal, my father has two Chevy work trucks from the early 70's. Both are C60 or C70 trucks. One has a 350sbc and the other a 366bbc, I can have both engines for free and they both ran when parked a few years ago. I don't know anything about a 366 engine except that it was mainly used in school buses and dump trucks, or if its even worth pulling. So the question is, which engine should I go with and is a 366 worth building at all? I want to build a good performing street engine w some decent power to replace the ol 307 that is in my truck right now.
Thanks in advance and begin the schooling
NOW
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