Anyone ever run Speedmaster Heads on their small blocks

remflex didn't come up for me on Summit but I did take that suggestion and look them up on Amazon and that was $32 which is the cheapest I've ever seen them..
Remflex Exhaust Header Gasket Sets 6004
https://www.summitracing.com/parts/rfl-6003
https://www.summitracing.com/parts/rfl-6027