Wow, lots of jetting differences here.
Here's my setup:
65 Metra (case not ported)
Dell SHA 16.16 with 16mm Malosi manifold.
74 Jet (still a little rich)
With stock 14:45 gearing it topped out right at 38 but get there in a hurry.
At 17:45 will top out in mid 40s. Can cruise there all day and pull any hill without noticing.