Well, I'm definitely new to the club, so I need some advice and answers.  Right now, my beautifully powerful SB327 sits with a .30 overbore (about 343 by my calculations) 10:1 compression with new pistons, a crank kit and new bearings, along with a holley 4-barrel.  Thats basically what my uncle told me, and I know very little more.  Also, this is still linked to the stock rear end and stock 4-on-the-floor transmission, both 1959 original.  My problem is that I want a new transmission, probably auto, because I want to be able to get that power down, not to mention I don't want to burn gas at 13 mpg in 4th gear doing 35.  Would I get a new rear end or new transmission first if I wanted to accomplish this, assuming a very tight budget.