could the intake be holding my low end down?

burrpenick said
Thought I had a dual plane, but turns out its an Edlebrock Torker II 340 single. This 360 w/3.55 SG seems a little sluggish off the line, could this single plane intake be the cause? The cam is not wild and its running on a built 904 w/cop car converter. The engine is fresh, and I dont know IF the stock 360 pistons were replaced.

Yes, get a dual plane intake.
It reads as if that would be the appropriate intake. Usually expect 'with the best of tune' that between the 2...it was the feeling of 25 or so ft.lbs torque increase everywhere under 5000 rpm with the dual plane...then neck and neck with the single plane rpm'ing/hp over the dual plane.