How are those prepped? Are we talking A D-Dart spec 275/273 with 4.56 gears? 11.9 sounds very quick. The whole debate was originally what a 318 can do against a 273, all things being equal 'cept bore. Lets do a 4bbl 10.5:1 318 with a 425/248 duration cam and put it up against a 273-4 with same cam. My initial direction was there is no use building a 273 if you can build a 318 with the same specs minus the bore. Same goes for building a 318 if you can build a 340 (not counting the larger head of the 340).
