size & "H-pipe"

I ran a 440 with a torker , 850 holley and 11.75 trw pistons and it ran best with 2 1/2 inch pipes , no H pipe . Had 3 inch pipes that ended at the dif , but the low end was not as strong , not as much fun on the street , a bit better at the track once the revs were over 4000 . Maybe a tenth or 2 at the track , hard to tell so many factors go into run times .