Very good. I did buy A book on these and it says it's a 75 only block. Not doughting you just saying I am trying to find info. BUT, It has a factory warranty block tag on the side. A crucial piece of information that I failed to include in my original post. My bad. I wonder if they used them as rv blocks and warranty blocks. I'll see if there is a vin on it but being a warranty block. Not likely. Thank you. #3870230