Speedmaster heads for SBM

There was a test done on AFR -165 heads on a other wise stock freshened up 5.0 and it gained 75 horsepower, there was nothing done to the heads. I wish that afr made cylinder heads for the sbm's. Edelbrock has heads just for the small bore small block Chevys. It would be awesome if edelbrock and afr were to offer cylinder heads for the 318.