Vintage drag race question

I agree with this.

Unless you're trying to replicate the car and it's period performance as closely as possible, there's no need to follow an ancient performance recipe. As alluded to above, you can make it look and sound the part easily enough without tracking down all the "period correct" internal pieces.

Any modern cam profile that takes advantage of faster ramps should easily outperform a mid-'60s grind even in a mild combo.
I actually saw one of the D/Stock Darts back in the day. My brother hauled my butt down to a Chryser dealer in Akron, Ohio to show it to me. He wanted to buy it but dad would not sign the papers! Good thing too. It was like a body in white. No options. It had the 4-speed, duel quads and camshaft change already done. The headers were in the trunk. It was kool!