I got as set of Flatattack twin plug heads, the plugs are side by side. They were cast by Mike Davidson from Aussie a few years back, he was going to run them at lake Gardiner salt flats. I ran them in my dragster with a twin distributor setup, had an HEI on the Right side of the engine with the front cover modifed to take a Mallory supermag 2 on the left. I will post a couple of pictures. It worked real nice.