I think the "This Is Not Happy Days" is a good idea and would sell . So many ideas come to mind .

Ralph and Potsy tag team some girl in bobby socks and old school shoes at Al's diner .

Fonzie bangs Pinky Tuskadero in Al's diner bathroom .

Chachi bangs Joanie at the Cunningham house right after the parents leave . Fonzie comes over unannounced as usual and jumps on the couch . Then he hears them bangin' upstairs , goes up there and joins in and does a DP . When Fonzie is done Bangin Joanies ass and does an anal creampie , he gets up , gives the 'thumbs up' , and says "Ehhhhh" (like he always does)

Ritchie tries all thru the movie to get his girlfriend horny . She finally gives in and calls him and says she is coming over . While he is getting ready he sings " I found my thrill on blueberry hill " .She comes over and they fuck . But he blows his load right in her face and she gets really pissed . Or he blows his load inside her and she gets pissed . I like the face one though . Maybe in her eye

All girls must be all natural . And absolutely no scene with AL naked . Unless you get Ron Jeremy to play Al and he accidently walks in on the Ralph and Potsy 3-way scene , then sneaks behind to the back and secretly watches from the order window behind the counter and jerks off .

I think Kristina Rose would be a good Joanie

And i can totally see Ron Jeremy playing Al , and saying , "Yeah yeah yeah yeah yeah yeah " .