I know it is not a direct comparison, but i think a Victor 440 is pretty similar to the TF. And i swapped to an M1 std port intake from a Victor 440 intake and have back to back track results. However, it is an M1 dominator flange changing from the Victor 4150 flange with a 1-1/2” tapered spacer. The victor/spacer height was pretty tall. The M1 was fairly low and fits inder a stock 68 b-body hood with a dominator carb and drpped base air cleaner with a kn filter lid The difference at the track was only .15 sec et and just about 1 mph. Really cannot tell at all on the street. This is a rb 505 with 620 hp.