There is no "single swinging pickup". To use a single line pump you plug or cap one of the holes in the dual line swinging pickup. The only "single line" pickup is the static pickup but it can't effectively be used with the 31470 pan - you would definitely uncover the pickup during hard acceleration and deceleration.

Personally, for a single line system I'd use a standard HV (Melling) pump and either of: a) Muscle Motors pump cover (least expensive alternative - quality piece) or b) the Milodon billet cover (the most expensive alternative) or c) the 440Source billet cover for the remote filter (looks like a decent piece - reasonably priced)