Thanks for the reply...do you guys sleep? I see that some of your posts are from 1-3 in the morning!
They probably named these transmissions a "crash box" after the one I have. Most of the parts inside have been brazed or welded. Because the tranny and clutch are frozen, I have yet been able to determine if the engine is in the same shape. If it is toast, I will probably go with a later 235. If not, I may stay with the 228. If I need a later bell housing for a SM420, will it bolt right up to the stock block? Will I have to replace the clutch and flywheel with a later model also? The rear end on this truck does not use a closed drive shaft. Going to a later model tranny that does not have a closed shaft housing should not be a problem other than some drive line work at the half shaft carrier bearing. In looking through the junk yards (I call them gold mines) around here, how will I know if I have spotted the elusive SM420 transmission? Any hints on that would be helpfull. Thanks again, Roy
