273ci thoughts?

papabear said
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

I'm not big on the Whiplash cams. If you go with a KB flat-top (valve reiefs and close-to if not zero deck), you can stand some camshaft. Some of the Street Force Howards cams look good, the 265DEH Comp Dual Energy is a possibility and the old Cam Dynamics Energizer (available white box generic for cheap) 272/.454"/110* is a default for this kind of build. The 272 sounds great in a 318 and is snappy. Open the Performer intake to slightly under 360 size (it comes 318) and gasket match the 318 heads to the 360 gasket. Put 360 valves in and bowl-hog (70* cut)/blend the cuts to the runners, use drop in 901 Comp springs or even NEW 340 red replacements. You can use the Mr.Gasket .028" head gaskets if you end up negative a bit on deck clearance. I use a 625 Street Demon with the TQ-like plastic bowl on my hyped-up .060" over 318 (270s Comp cam), and it works flawlessly out of the box. I use a Flowmaster 2.5+2.5>3" merge collector and use one 3" muffler behing 318s for torque production and packaging. Plenty of flow!