Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies OK, I got all my valves set to cam specs, .014" I and E cold. I got it all back together and fired it up. It started great and the idle was much smoother. I checked the timing w/o vac hook-ed up and it is close to 14deg btdc. With vac it goes about 16/17 btdc. I idled it for quite a long time and it stayed right dead on perfect temperature. I put a vac gauge on the driverside vac port of my rear Eddy and the vac runs about 12 to 14+. I adjusted the idle screws and got the vac and rpms ore stable and it was about 14+ on the vac with a slight downward wobble. Then while I was tightening the dist. all of a sudden it started to spit and cough. It backfired bluish smoke out both carbs and dieseled to a stop. What in the world? The temp was still perfect. It did start but not right away. Then it idled well but started popping a little when I raised the rpm to up about 3K. I'm going to pull the valve covers again and recheck the valves. I suspect that the adjusters are loosening. I have a spare set of stock heads so I can swap the rocker parts. Is the adjuster screw able to be removed and replaced? Is there a longer adjuster screw available that you can put an extra nut on to lock in the adjustment? One of these days I'll get it figured out! Thanks for your help too. ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.