I’m sure you know on these intakes the top wall curves/pinches down more than the floor. By welding I can match the head port and basically remove that curve and blend it into the top. Hoping that is the right move. I will also have the larger top to try, I measured that street top and it’s actually only 173 cubic inches. This motor will be a 418 with 13.3 compression. Wonder if the larger top is better move for my application. I will shift around 6700 but runner length on these are perfect for that