Sorry, I will have to do some research on the part # for the clutch. I'll dig out the manuals tomorrow at the shop. I'm sure speeco would probly sell it to you though.
I definately don't mind not running at full throttle. Actually, that's why I'm being picky about the pulley size. I really don't want to have to run at full throttle. If I could get a pulley in the 2" range (measured from inside of belts), that would give a flywheel speed around 350rpm with 3000rpm engine speed. That would give options to speed it up, or to slow it down. The DR clutch might be the best option though. With the speedpro running a little smaller flywheel, that actually speeds up the flywheel speed. So, in essence, the speedpro would still have a faster flywheel speed at any engine setting.
As it is now, I can't slow the engine down any slower and keep the clutch engaged (engine rpm 2600 = flywheel rpm 470).
Hopefully they will get the parts out and get these things up for sale again. Then you can go test drive one. I don't think you would be disappointed in the return speed of the ram if fast return is what you are looking for. The ram always bounces off the stops at least once after each stroke. A test drive might also make you carefull of how much you increase your flywheel speed. I was actually surprised at how slow the SS was flywheel speed is. But the numbers don't lie, 1" pulley with an 18.25" flywheel at 3850rpm actually only charts out to a little over 210 flywheel rpm. I wouldn't have believed the pulley size if I hadn't seen the picture with a tape measure beside the pulley (measuring where the inside of the belt runs). I won't argue with Paul @ SS though!! I'll leave that to the man wanting to put a diesel on his SS!!! I want to see that video!!
After thought...wonder what rpm a small diesel engine needs to run? Most diesels don't wind up near what there gas counterparts do. I don't know about the little diesel engines. Hate to see the there price tag!