hey ryan, ryan here.
I have piston/cyl/clips/pin for ya, I believe it's 2hp but I will make the measurements and figure it out for ya later today. flat port 4 sure. one of the fins was cut a lil to make access to exhaust nut easier.
No head sorry.. but lemme know if you're interested. Good condition, no seizes or scratches. could include the stock square bing intake, what's it like 12mm?
anyway email me lemme know if you're interested.