My 273 Experiment

Thanks to cross_thread72 I now have a 273 Block.
I have wanted to build a small block for a few years now, so I am going to slowly build a 273 with a few parts I have located along the way.
Feel free to chime in with your ideas!
The engine will run in the Colt after I get that going so it's a few years away.
Baseline:
I want it to look like a 273 Commando, so Factory Covers and Air Cleaner
273 block, bore ?
318-3 crank
318 Swirl port heads
Crane Fireball Cam, Specs ?, 273 adjustable rockers
LD4B Intake
Electronic Ignition
650 4777 Double Pump Carb
Tube Headers
Manual Transmission
Lots of gear and Tire.