An Idea for a Modern Campaign

Just a random idea I had today, but basically it is a modern rpg game, but set in the 50s or 60s, with the characters being greasers (or, if the game is set in England, Teddy boys).

I'm not sure what rules I'd use, maybe some form of S&W, but with AD&D's unarmed combat. Weapons would be knives, bike chains, the occasional gun, and things like broken bottles, etc.

I might post more on this later.