Is there any way to tell if it is a windsor or or cleveland??? And what is the difference?
No, Clevelands were only made during the 80's
actually the 351 Clevelands were made only in the 70's. 1970 model year to '74 or '75, I can't remember which. They were never put in Broncos from the fatory.
On a side note, I don't know if anyone on here plays with Clevelands but I'm going to be tearing down one of mine from a Mustang pretty soon and will be offering some 4bbl closed chamber heads, Torker intake, MSD dist. and other goodies for sale.
Heavier by far = 23 pounds...?the cleveland is part of the 335 series of small blocks produced from 1970-1974. it is a heavier block by far, .