They are all the same. The Massey 410 and the Gleaner F2 used the 292. They have the big exhaust manifold. Some of them even have the HEI units on them. The one's that I have seen have been in relative good condition. They were always run at a constant rpm. The Massey 310 had the slant 6 in it. It also had a side draft carb on it. Hope this helps.