running out of breath in the 1/4 mile

I had a fuel pump test done when my engine was on the dyno. The stock pump I was running could not provide enough fuel for my engine. It started loosing pressure @ 3400rpm and by 5k, it only had about 2 lbs of pressure.

My engine only made 380hp and 420tq. standard stroke 360, same cam as you, same size carb.

After recommendations from this site to stay with the stock 5/16" line. I simply installed a Carter Street/Strip pump that has more than enough fuel delivery for my engine. I shouldnt have to worry any longer.