What kind of Headers are these? (Just added pics)

with that short collector, i would say cyclone or blackjack. back in the late 70's, mr. gasket bought out appliance & cyclone mfg's. they combined the two into blackjack headers. to bad they didn't go with the appliance style. this had to be the best fitting street header, next to the tti's, for a-body mopars ever made. they had great ground clearence & were easy to install. they came with a 4-bolt flange for the collector. the drivers side #1 tube was a slip fit, this helped installation. i found a premo set at a swap meet a few years back. the guy knew what he had. he wanted $200.00 for the set. i should have bought them. someone needs to bring these back.