I can feel that the ol 304 could use a bit more carb at about 2700 RPM. She tends to have a very predictable climb in speed right up until that point, then she climbs speed linearly and a bit slower. I can certainly get by with the holley 350 without a single problem, and I bet I can get pretty good mileage out of it, but a little bit bigger carb might give me everything I want (power, economy, 4x4 prowess).
I've been eye balling the Holley truck avenger 470. Holley states that the 470 is for six cylinder motors, but there is no reason a small v8 like the 304 couldn't manage one just fine. Have any of you guys used this carb, or do any of you have any ideas/opinions on this carb?? It has everything done to it already that I would do to my 2300 (350 CFM 2bbl) for wheeling. I feel 470 CFM should be perfect for it because it has the performer intake, tube headers, and will eventually have a torquey low end cam. The Summit CFM calculator puts a 304 race motor with a 5000 RPM max at 484 CFM (not that mine will be all raced out with high RPM goodies). I feel like anything larger will be past the point of diminishing returns.
I'm looking for a Scout II Dana 300. Drop me a line if you have any leads. Thanks