running out of breath in the 1/4 mile

when I check it, what do I look for, a certain I.D. ? The hose is clearly labeled, as what barbs it will fit. It is too stiff to be stretched or clamped,to fit a different size.

and while I'm on the topic, it almost looks like the fuel line looks like a AN8 size, does it make sense to run an AN6 into that? A/N is sized in 16ths,so a -6 is 6/16 or 3/8inch, and a -8 is 8/16 or 1/2 inch. At your power level, 3/8 is more than adequate, for full load/WOT. IDK where 5/16 runs out, but I think you might;top of second at 420hp?.lol