Carb spacer/intake flange?

I have the carb off my 434 and noticed that the Super Sucker four hole spacer doesn't match the intake flange opening very well in the corners. It overhangs quiet a bit, tomorrow I'll try to scribe it to see just how much.

When I sent the heads and intake to Larry Smith he wanted the spacer too so it went along for the ride. It appear he sand rolled it to remove some of the cnc lines. When this engine was on the dyno the Super Sucker was worth 13 hp and really balanced the afr's on each bank.

I'm wondering if there is anything to be gained by matching the bottom of the spacer to the intake flange opening? Anyone anyone tried this?

Thanks, Justin