Anyone know of any tests where a stock type 440-4 build was tested with a 440-6 on it??
Was it worth more than the claimed 15hp gain?
Sort of...
After Dulcich did his big 440 intake comparison which IIRC included an OEM iron 4-bbl, he did another article where he tested a 6-bbl on the same engine to see how it compared with a Performer RPM and a Holley 830 HP.
Once he stuffed enough jet into the outboard carbs, the 6-bbl made a few more HP than the Performer RPM combo.
I suppose if you could find both articles online that there would be a way to compare the OEM iron intake with the 6-bbl. But it wasn't a stock 440 he dynoed, either, so the comparison would need some caveats...