['68 Newtricks]

Does that vacuum switch go straight to manifold?

Hmmm, I only have experience with the BTO kit. I'm not completely sold on the vacuum switch. These transess'es tend to be overhappy with down shifting already, unless you've got good HP/TQ for them. I'm happy with it staying locked, less drama and less heat build up. But then again, my 400sb helps.