How ironic....my DH also turns 50 in June. We were just talking about his party this morning. I have already given him his gift which is a Richard Petty driving experience. We live near Lowes Motor Speedway so on June 7th, he will drive to his hearts content 8 laps around the track. We are having his party that evening at the house. The theme is going to be something NASCAR. I was thinking a lot of black and white with the by-line on everything "Racing to old age". He is okay with it as long as I don't go too overboard (his words). I could so easily go overboard with that theme so my challenge is to scale back on it.
I would think with muscle cars, you could use the same thing. Not the NASCAR but the "racing to old age" thing. I know muscle cars aren't racing cars but........ Maybe you could find an old car at a junk yard for cheap that a friend could tow to your house (if that's where the party is). It would make a neat backdrop for pictures.