Did Jack go work with Mayall ??? I dont know,.
What About Mountain ??? Felix Pappalardi, Leslie West.
Originating in the eclectic music scene in New York's Greenwich Village, he became closely attached to the British power trio Cream, writing, arranging, and producing for their second album Disraeli Gears. As a producer for Atlantic Records, he worked on several projects with guitarist Leslie West; in 1969 their partnership evolved into the band Mountain. The band lasted less than five years, but their work influenced the first generation of heavy metal and hard rock music. Pappalardi continued to work as a producer, session musician, and songwriter until he was shot and killed by his wife Gail Collins in 1983.
Funny you mention Mayall, theres a group around , heard it this morning, doing "room to move" Cant remember the name of the group, man they didn't change a thing, at first I thought it was John Mayall !!!! been played on the Brookdale College Radio Station 90.5 man Brought back memories . Geez, thats why I dont play that old stuff too much, too many memories .