Hank,
Great comments and pics on head porting. I'm porting a set of Brand X right now and it got me thinking about stuff.
On the Offy vs Clifford, here are the 2 best runs with each intake. Results are corrected for car weight (down to a gallon of gas) and weather (Temp, Barom, RH altho it was all pretty constant)
Intake....Carb....60foot....0-60mph.......1/8 et/mph
Clif.....600AFB.....2.580...10.127.......11.266 at 62.383
Clif.....390Hol.....2.585...10.469.......11.318 at 62.870
Offy.....450Hol.....2.582...10.208.......11.238 at 62.506
Offy.....390Hol.....2.574...10.487.......11.284 at 62.277
That's why I called it a "tie", to me all these are SO close, how would you pick? So I'd go by price $$$ in a nice climate like ours, or go with the Offy for its cold weather driveability for a cold-weather capable car.
EDIT, FYI these tests were done with weight~3050lb (includes me), 250cid stock + 4bbl about 170hp, 1.82 powerglide, 3.08 open rear (no traction problems for sure)
