Found it in a shed at a house my buddy is flipping, curious if anyone has any info on it. Tires are solid rubber, no tubes or inflating. Thanks!
He may be able to get by with ah definitely looks like a homemade Manco 400, just out of square tubing. But yeah wow out of all the homemade ones that one looks pretty dang good! Change out those tires though.
Small note - Looks like you won't be able to fit much else other than a flathead on there given how close the seat is to the engine plate. So if you wannt to run something like a Predator (which I think would look wacky on that neat vintage homemade frame), you'd have to either move the seat forward or the plate back and reweld it.