One thing to watch for on FE industrial engines is, the hole in the block at the bottom of the distributor, where the oil pump drive shaft engages the dist., is bigger than on the car engines. Not a problem as long as you use the heavy duty dist. and oil pump, but the car-type stuff will fit in there without the support of the bottom bushing surface. A machine shop could bush the hole to fit the smaller drive. I think the difference is only about 1/64" or so.(33/64 drill fits the 391.)