I know Offy makes the aluminum cover but it is a 2 bolt style, as well as the Wayne cover.
I have no real reason for wanting the 4 bolt other than I like the looks of it better. (I guess you could say that would be reason enough)

I guess I am alone in thinking that I remember an aluminum, no name, one being made in the 60's.
Oh-well.

And John M.... , I have absolutely had no luck finding a good carb cleaner, so I think "they" have already taken the good stuff out of it.
I have found that "CLR" (house-hold cleaner) actually has been cleaning my carb's better than the $40.00+ per gal. of the so called Carb Cleaners. But using CLR can be a little tricky because it will eat aluminum if it is too strong and you soak with it too long.

Thanks everyone for your input.

Ed