WELL, the original, AKA Edie Sanders', ALT250R was an RM conversion running a NICHOLSON, yes Nicholson!! AKA Nick Nicholson AKA the same Pickleson who made my 90 frame!, chassis! I have a friend in Cali who is real close to Mr. Nick so I may ask him if he could get me some details of it.
As for seeing it,,,
the first 15 seconds of this video you can see it twice in good (but quick) side shot