This issue is a variant of The Fabulous Furry Freak Brothers (Rip Off Press, 1971 series) #2. There exist further variants.
Indicia title for this issue is Futher Adventures of Those Fabulous Furry Freak Brothers.
Sequence on inside of front cover with blue ink as background and part of the panels (but not in reprintings). Indicia information at bottom of page.
Why mailed in requests for an issue were delayed.