Added timing= running out of fuel??

Added timing= running out of fuel??

Last night I installed an MSD pro billet distributor. My old distributor was running 20 degrees base timing, all in at 1700 rpm with 30 total. The new pro billet setup is 26 base at idle, starting the advance around 1500, ending at 2700 with 36 degrees. When I stand on the throttle, in the mid-top of second gear, the motor feels like it lies down, like its running out of fuel. I can rig up a fuel pressure gauge to the cab and monitor, assuming its a fuel problem. Is it possible for 6 degrees more base and total timing to make a motor starve for fuel? I know a problem may lie in the tiny 5/16 fuel line, but the motor has never done this before with the old distributor
Combo is:
415 stroker, air gap, 800 Holley DP, Carter high volume mechanical pump, 6al box, 5-16 fuel line