Holley 4557 spark control vent tube

[martyb]

So my LS6 does not have the TCS hooked up, currently I just have vacuum running from the base plate directly to the distributor. Looking at some pictures the TCS lines ran to the distributor, choke, and vent tube on the top of the carb at the secondaries. Car has been this way for a long time and runs well, so I am guessing the spark control vent is not necessary to run vacuum to? Was going to put the TCS back in since I have the original one that was removed back in the 70’s, but after reading more it appears to it’s more of a nuisance and will limit timing.