.509 Purple cam in my want to buy 1971 Scamp

LOL at you guys...

To answer your question, the gear ratio is a bit numericaly low for the cam. You also didn't mention the stall converters rating, so, while it could be a very doable combo, I myself would go 1 of 2 ways for a better runner. This would be ethier;

1. get a new gear ratio, 3.91's min. Tire size plays a roll in this.

2. (With the gear ratio staying at 3.55's.) Change out the cam for something more street freindly, drop the duration down some. A nice split pattern cam from Comp Cams, Hughes engines or Lunati.

Sweet lookin ride dude! I bet that things has long legs on the top end.