My advice, start small, SE Class A, maybe a $100 worth of parts, just to get your feet wet, I realize you have the smarts, but don't overlook the practical application, jumping into something on the scale of a JCM 800, cold, may result in a very expensive, oscillating, pile of components thats not finished in time, but you know your abilities and I don't, so just take all that for what it's worth, but here's something you will need,

http://www.ampage.org

all the links for suppliers, info, software, etc if you can't get it from there, it probably can't be got, Good Luck, N.H., and keep us updated, OK?.........