From a datsun 1200 website.... I thought they were non-crossflow, but I digress from digressing. Looks cool......... but that's a lot of compressed fuel/air mixture!!!!!!! I'd put in a blowUP valve in there. There is/was a chap in Waitoa, Waikato who had a flat track something maybe a Fiat, pretty sure it was a Fiat 4 cylinder. It was supercharged draw though that looked very built for purpose. His nickname was Nigger Crusher, though I'm not sure anyone actually called him that. They were different times the 90's. Wonder how much of a bastard a flame arrestor would be.... in conjunction with the blowUP valve. Happy tinkering.