Engine Swap?

As for the swap here is what I have been able to find out: The search for a suitable replacement engine for the older Sears tractors is a never ending task. Now that the HH series of Tecumseh engines are no longer availabe, many owners have written messages asking if there is a bolt-on replacement available. Some current engines look like they would work. Here's the problem with the engine replacement--the clutch engagement assembly. More specifically, what Sears/Roper calls the "Idler Bracket, support weldment and bracket." This part bolts to the rear of the engine. The idler bracket is mounted to it, which is in turn linked to the clutch pedal via the clutch rod. The replacement engine will need to have the same mounting hole pattern as that on the idler bracket for it to be an easy swap. Plus, this bracket is bent to conform to the side of the engine. There are threaded holes in the bosses cast into the block of the engine where the bracket is bolted. I'm sure that an experienced fabricator could easily make another type of bracket to mount the clutch engagement assembly, but then it would no longer be a simple engine swap.