When I bought my B1 B/S heads back in the early 1990's there was not many choices for aluminum heads. There was the Indy 440-1, the Mopar Stage VI, original B1, B1 B/S, and Stage V hemi conversion head. Indy came out with the S/R several years later after they filled the ports of a 440-1 for some engine shootout in either CarCraft or HotRod?
Several years after that Edelbrock produced the performer head.

I ordered my heads from Koffels with their stage 1 porting, rocker arms, pushrods, and sparkplugs. With shipping I think it was right at $3,000.

A few years ago, I broke the intake valve head off the #4 cylinder. This may have been my fault as I neglected to change the valve springs. Anyhow, I was going to send the heads out for repair and do the max wedge cnc porting, but I decided to try out the new Edelbrock Victor heads.
I know this is not the for sale section, but if anyone is interested in my old B1 B/S heads for $1,000 PM me.