Smog pipe

[stovebolt]

I'm gradually installing the smog equipment my '68 L6 originally came with. I don't have the smog pump yet but most everything else. My question is: could I install the pipe assembly and check valve but not the pump? Will the engine run normally? Will the engine require carb and timing adjustments? The carb and distributor are the original smog units. Thanks for any help. Joe.