Inliners International Forums General Discussion Engines GM 4 cylinders 151 153 181

My engine is a 153,not a 151 Iron Duke. Here's what some of the parts look like.it's a branched cast iron exhaust. The bolt holes line up with a stock 153 head,but the ports are way off? Very thick walls, probably for an industrial version?Or maybe the early 151 Iron Duke with the intake and exhaust on the same side?
If anyone has a use for it let me know



And what appears to be a propane intake.Nice ports but again only the bolt holes line up to the stock head.