Plugs #1,3 and 2,4 fouling

Got something funny going on plugs from cyls #1,3,2,4 are fouling and rest look good,360 edelbrock 750,edelbrock performer rpm intake,re-curved dist,blaster 2 coil (with msd ballast as per their instructions)accel wires,I am thinking that the air cleaner is not allowing enough air,I have my choke hooked to 12 volt wire(on the ballast)could my choke be closing?this is the second time for this,I've changed the cap and button also wired the second opening on the breather open(dual snorkel)thanks.