Any of you guys know much about these? I thought they were a more 70's thing for smaller cars, but there is a guy in the Bay here that's got one that came out of a early 60's Buick Special. I was thinking of dumping my SBC for something a little more rare and different, but I don't know. Any of you guys used one of these blocks before? He's got a 3 speed manual with it... can a chevy 3 speed auto bolt up?