Unported head quickness?

73 duster , 318 from a 1983 police pursuit diplomat. Motor has 360 heads, cheap headers, cherry bombs, 2 1/2 pipes out the side. Dual quad tunnel ram with 2 - 600 cfm's edelbrock/ Carters. Stripped interior accept 2 low back buckets ( junk yard van seats).no bumpers, brackets, or hood. 4 speed. 8 1/4 line lock rearend 355's. 15 × 10.5 × 26 ET slicks. The best so far is a 14.2 @96mph. Thats very few runs and no tuning. It's got 13's in it?!?
I hope:)