This is the big blown 463 pontiac I'm in the process of assembling for my '67 GTO, just mocked up for now.
Shortblock: '68 428 block, bored .065 over, filled with hard-block up to the bottom of the freeze plugs, all new internals eagle 455 crank & forged steel rods, J&E flat top forged pistons, Total seal TNT rings, billet 4 bolt main caps, Clevite 77 bearings, all work done @ Accurate Engines in Kirkland, WA
Heads: 7m5 heads 114cc chambers, with 2.11/1.77 stainless valves, exhaust crossovers filled, ARP head & main studs, butler head gaskets, 8.3:1 static compression ratio
Camshaft: SUM-K2802 282/292 adv duration, 224/234 duration @ .050, .512/.537 lift with 1.65 harland sharp rockers, crane dual valvesprings
Induction: GMC 6-71 blower, old weiand front & rear covers, BDS intake, 3" drive, dual holley 750 vac secondary carbs
Misc: Meziere water pump, Canton oil pan, homemade crank scraper, Melling H/V oil pump, M/T valve covers, hooker super comp headers, flat Tempest hood cut for blower (don't worry, I didn't cut the GTO hood)
I also have a set of fully ported 6x-4 heads (93cc chamber, yeilds about 9.5:1 C.R.) and a performer RPM intake so I swap to a single 4bbl carb and the stock GTO hood. This way I can either run blown or Naturally aspirated, depending on what I'm doing with the car, the swap can be done in just a few hours.