Very mild 318 - Comp 252H vs 340 cam?

Tylinol said
Good questions - 904 auto with stock converter, '69 Barracuda. I'm unsure of the rear end gearing, but it's a 7.25 so I will probably be trying to find an 8.75 to swap out at some point soon anyway.
Tires are F70-14 Polyglass.

Very similar to the Duster I mentioned. I ran a 8.75 with 2.76 and the same sized tires. My tires may have been E70/14, but close!