Here's a web site that I think will have the info you need. http://www.mortec.com/bbc.htm. To my knowledge the 366 is still available. I'm not sure about buildup info, but the later model ones I have seen are different because some of them have 2 thermostat housings on the intake. I would think it would take a different set of heads, pistons, intake and carb to make it rev, but the bottom end is stout.