I took a bunch of old track test data from several magazines for 440s and using test weight, mph and weather conditions, correcting to std conditions, they were in the 300 range. I don't think any of the 4bbl cars broke 100 mph. Like Lew said the DC book called them 275 to 320.
Back in 1990 we were talking even back then how hard it would be to truly replicate a factory 440. If you want to try Dwayne, ill toss in the 2.03" (+0.030) pistons.
When we swapped out a factory TQ intake with a Holley 800 cfm spreadbore carb to my 6 bbl set up on a stockish 440 it picked up 2 mph, from about 102 to 104.
My opinion is a truly stock 440 with a well tuned 750 avs/afb Probably gives up 20 - 25 HP to the 6 bbl. But once you do just a little more to the engine, the 4bbl intake has no more to give as it is the limiting factor, where as the 6bbl is not. Add a little cam and better head to 6bbl motor and it mighty pick up 30 or 40 HP but on a factory 4bbl maybe only 15-20 HP.
That 440 I started 4 years ago I was planning to do a bunch of track testing of intakes and carbs on a 425 - 450 HP potential motor. Maybe ill get back to it.
