This ia a head & manifold from a 1937 chevy laying in the junk pile were I grew up. I tapped out the front cylinder for a single exhaust pipe. The cops made me remove it. It has been laying there in the junk pile for 56 years now unmolested. My nephew owns the land now. Some day I will have to tell my nephew the stories & history of it and the fun I had with it. I ran a 1" water pipe to the rear bumper for the exhaust. It crackled like a machine gun when reved up the engine and left my foot off the gas.