273ci thoughts?

Well, that was fun to read...now back to where this topic has morphed - building this 318.

I have a 318 with 675 casting heads. I tore it down and the block seems good, no bore taper, only one questionable area on cylinder 3. Mains are 10 over, but rods seem to all be stock size and measured consistently and not out of round.

I also have a running 273 that I pulled on Saturday. Ideally, I leave this thing complete and stash it away to remain untouched for the car in the future.

From these parts, what is my optimal build here?

Desires:
318 street build - fun driver

Plan:
Vat/clean block - remove ring ridge and hone cylinders
Disassemble/clean/inspect heads for damage
Port 675 heads at home
Valve job at home
Edelbrock 2176 dual plane
Hughes Whiplash Cam and supporting parts from Hughes
New bearings/gaskets

Unknowns/Still left to decide:
Compression ratio - which pistons to use? Which head gasket to use?
Carb - Thinking we gonna be around 650 cfm?
Exhaust - car currently has 2" true duals...going headers I would imagine, which ones for 67 Dart?

Thanks

Now that's decided, You should get an adapter for the 318 crank to index the 67 904 smaller converter hub. I always use Fel-Pro head gaskets. I can't recommend a certain header, but the headers will have to seal to the 318's smaller exhaust port. Some headers are made for the larger 340/360 exhaust port. I also like a Thermo-Quad so I'd also look at the Street Demon carb. My 2 cents.