318 driver - cam change or not?

^^^THIS, all day and night long^^^ every time I’ve helped change an intake or do it without swapping the cam I always say after it’s done “Well, it’s a lot better, but had we put this or that cam in it would have gained that much more again.” It’s all about properly matched components. And as Mike says, 2.94 to 3.21 gears in a stronger rear end will make your car a lot more fun to drive.