Hi Harry,
It seems no one has come up with an aluminum timing cover yet, perhaps this new post will shake the trees a little.
Would it be legal for you to run a marine aluminum timing cover? Tim McMaster runs one on the FED. He fabed up an electric water pump on it and it works pretty good. It usually requires a marine aluminum pan as well because the cover is much shallower that stock. However, I believe a stock pan could be modified to work. Perhaps Tim will chime in.
Just trying to help.
Charlie
Charlie Burns Laton, Ca (South of Fresno)

BurnsRacing981@gmail.com