Anybody running the '68 4 speed 340 cam?

Thanks Toolmanmike, I will look into adjusting. I just set the timing to TDC as the book says. The car runs well, it just shows a low VAC. Everything else is a NO, unless the purple DC cam already has it added in.
Is it the DC cam P3412044 68 340 Man. (LSA 114 / 276/284 / .444/.453" / ICL 112) or something else?