Well firts those tractor engines where the first 4 banggers that broke the first 7 seconds in the 1/4 mile so not such tractors in my opinion,
And sorry to contradict you but the Dodge Ram50 small non 4WD pick up truck came with the 4G63 Mitsu 4 engine. and thats a fact buddy, go and search for engine gasket set for such truck and you will see!
Here a part # from Victor Reinz,
Engine Kit Gasket Set 95-3133VR (1990-1991) 122 CID (2.0L) SOHC 8V L4 3.35" (85.0mm) Mitsubishi, Engine Code: 4G63 (1990-1991)