The V8 flat head is an easy conversion almost bolts right in. I've seen a few around here. Roger watch (listen) the video he mentioned what he paid. I don't know for sure but the more I look at the tractor the more I know its not an 8 and may not be a 9. Lots of things in the wrong places. I've owned mine a while and work on it all the time. The carbs are easy to get out of adjustment and easy to put back BUT they are getting harder to find and buy. I think they get a wooping 27 HP out the back.