Quick update on available flanges for the Victor head.
The top flange is from Stainless Headers. It is 3/8" stainless. It is literally cut from the shape of the CAD file Edelbrock supplied for the gasket. I know it doesn't affect function, but it is quite ugly in my opinion, and the exhaust port is way too big for my application. They sell for $120 set plus shipping. I'll sell this set much cheaper, just call or email me.
The second one down is one I had made. 1/2" stainless. The port shape matches the exhaust port on the head, which is basically 1.75" tubing. I think it looks the best, but needs a slight trim around spark plug boots, as they touch the flange. This set is for sale cheap as well.
The last one is what I'm going to use on mine. I tweaked the design a little for my application. Still 1/2" stainless. Not as pretty, definitely heavier, but it's for a turbo flange.
I can make a lightened version of the bottom one, in steel or stainless, 3/8" or 1/2", but would need a few ordered or they will be pretty spendy for a single set cut.