I tried it... despite the bores being different, the head is flat, so I figure if I used a D750 gasket it'd work. Unfortunately, the valves on a D950 are bigger diameter than a 750, and they scrape the cylinder wall... it was close enough to make me keep trying to make it work for WAY to long. I finally gave up and instead made the D950 fit in my B7100. The engine was was from an Onan marine generator had a different flywheel, oil pan, front gear cover (oil filter on the wrong side, interferes with frame), no front PTO shaft and the coolant ports are different size and position. Also it has a generator governer that is significantly "stiffer" at regulating RPM. Flywheel and oil pan swaps over, front gear cover does not. I had to put on a remote oil filter and fabricate a front PTO shaft that bolts to the front pulley. The coolant lines are adapted with soldered copper plumbing fittings and took some creativity, but now I have a tractor with a waterpump and more horsepower than I need... would I do it again? Maybe. It ended up costing less than a new head, cylinder liners and at least one piston, gaskets, rings, etc. but it took a lot of time and now I have a bast-er-dized tractor that is more complicated to order parts for in the future... If I ever find a D750 parts engine with a good head I may consider trying to fix my original engine up and swap back, but probably not worth the trouble.... good grief, I digressed from answering your question, but hopefully the info will be useful in helping you make decisions.
