Unpacked the box from Vans and inventoried parts. Vetterman stainless steel exhausts, and LORD mounts for the conical configuration of the O-360 engine. Iso mounts are sold in "pairs" and four pairs are required for one installation. Shockingly expensive ...
Impressive fit and finish on the Vetterman's - can't wait to hear that engine roar.
But the F-631A R&L was a different surprise. Ordered TWO thinking one right & one left. But that's two complete R&L's --- time for an RMA. And get a few bucks back for the next task.
UPDATE - 7.7.15 - researched the 'lost mount' today to replace it. It's a LORD MOUNT J-6230-1 (without the engine bolt). There is additional 'clocking' information available to align these, too.