Just to add more "fuel" to this fire...
I know this is ancient history at this point, but I ran my Demon 225 in Stock NHRA at Englishtown. Took out quite a few small blocks ('74-'82). The national record was 15.2 @ 83 mph at the time. I got it down to 16.92 @ 82 mph and still street driven. Specs' (to my recollection): +30, stock spec/blueprint cam, aluminum 1 bbl intake, hooker headers, 904 manual shift, stock stall converter, 4.10 7.25 rear.
Car weighed in about 3300# wet & loaded. Consistantly in the points for 6 years.
Obviously, if I had a converter, blueprinted the head it would have been faster.. I did play with dual Holley 1 bbls and it felt faster, but I ouldn't prove it. the slantys can be real torquey for sure. This is interesting, cuz I was just reading an article in Mopar Action about /6 vs small blocks. Bottom line, 318's and 360's are cheap and plentiful and cubic inches trump uber alles...I did love my 225, just the lure of a 340 won out .....