I use the SCE 128103 intake gasket that has about a 2.320" tall port opening ( the catalog suggests a differant smaller figure and is incorrect) the ports on my cylinder heads are a tad bit smaller or about 2.300" tall. My Tomahawk intake is able to port match to my heads with about 1/8" over the ports to seal. I bought the Tomahawk out of interest to see if it would be ok for my current 505 combo, that and it looks so nice in the polished version. But on the dyno it only produced 611 hp about the same as my Performer RPM intake with 615 hp. The Victor was king with 635-640 hp. It was not hard to make the decision which intake to use. Later we milled 0.650" off the Victor intake carb flange for hood clearance issues, refined the cam (3 degrees smaller but more lift) and put it back on the dyno, this go around it made 660 hp with the cut down Victor intake. It has no streetability issues with lack of torque
Track tested.....
With Performer RPM intake = 10.99
With cut down Victor intake = 10.63
With factory intake = pissing into the wind