Alan that is what I suggested, it would have to be billet or cast, top piece bolts to original mounts then sump below that, oil ending at same level. Steel stamped pan is out if made in low numbers. I would use the retun port to run thru a cooler in the hot times, and just looped back in colder weather.
Re Billy Budde, not positive he ran tankless but seem to remember he tried it.
The bike shown appears to have a tank, as I see nothing xtra underneath, tank being more central tho, looks a LOT cleaner.. I have a stamped oil filter like he has in the pic..a bit surprised they never get talked about on here..
Those pipes and he built at least another version, still blow me away, the curves across the front are so well done and the turn bend into the muffler is so smooth looking, still impressed by them..
I mean you may not like the style of the pipes, but the smoothness and fit is still amazing.. and that was done 30 years ago.. Still wonder what he used..
.. makes a Yoshi handbent look like a high school project..