[M5-]

Thanks for the help, its starting to maybe make some sense. Could it be the original 292 top end on a 1975 250 bottom end maybe?

I wish I was at home right now and I would post some more pics but I'm at work and I'm leaving town till Wednesday. As far as the green and yellow thing goes I'm thinking farmer with John Deere stuff. Somebody has been into the engine at some point for sure as there is orange silicon all over the place. I'm not too familiar with these engines but to me the rocker plates on the side look like 230/250 size not the taller 292 ones. I will post a pic when I get a chance. The stamping code next to the distibutor also points to 250 being that it ends with code TH or at least thats what I've read in a few places including the LMC catalog which I wouldn't take to the bank. The casting number on the block decodes to 250 as well from what I have read.I found the page below on here and that's where I got the UH thing from to match to the build sheet. I'm sure the build sheet is original but I haven't tried to get it out as it looks like it's about as delicate as an ancient scroll from an Indiana Jones movie, I'm afraid it'll turn to dust.

Maybe when I get home I'll pull the rocker cover and see what it has for a head.

Thanks again
Paul