The block is where I have some questions. There appears to be very little wear on the cylinder walls (can just BARELY feel a ridge), and can still see a cross-hatch pattern. I haven't checked the bore diameters yet, so I don't know for sure just how much they have worn.

Any guidelines to go by regarding the block?

My plan is to stick a Z-303 cam, FRPP timing set, Edelbrock Perf. RPM intake, Holley 650, Accel 300+ ignition and Crane roller rockers from my nuked engine ('69 302, carb screw into #2 cylinder, ugly), heddman headers, heddman x-pipe & flowtech afterburners (2 1/2"), 2800 rpm stall, C4 w/shift kit, 3.55 rear (usually drive every day in summer).

Any one have any suggestions?

Does anyone have any idea what kind of valve springs to use with that cam (specs: roller, 228 @.05, .552 lift, requires 120# seat pressure closed, and 340 @ .552 lift). About push rods, stock or longer than stock? (just hoping one of you guys out there have done a similar build up...)