Hello, I have a stock 1966 911 with original solex carbs. The car runs ok at speed but loads up and almost dies at stop lights. I've changed the plugs with little improvement. I've read the "Black Art of Solex carbs" - moving forward. At this point I'm looking for a few suggestions that I could try before calling the shop. Also, any leads on sourcing a sync gauge/meter? Thank you for your help.