My car was originally in Nebraska.. I think the sea level was around 3000..? not sure.. anyways, it ran great there.. great power, smooth, quiet, and good gas mileage. 19 screwing around town, and 23 highway. Now it's by Wash DC and it developed a ticking. I've adjusted the valves, and I'm sure it's not in the lower half. Also, I've noticed my gas mileage is worse... haven't figured it up, but noticeably worse. The carb is an elec. choke Edelbrock 600cfm performer. The engine is a non stock 350. Anyone have any ideas on how I need to tune my carb and timing for this? It's cold as hell outside so I want a plan of attack before freezing to death..
Thanks for any help

Go richer and take out some timing.

Get an edelbrock jet calibration kit for you model number 1406-1407 .... which ever one you have. It comes with the proper jets and needles you will need. The instructions are very easy. Keep going larger by 2 sizes, until you are running to rich, then drop it back down one size. Set your idle with a vacuum gauge, plug it into a non ported vacuum port and turn the air/fuel mixture screws until you get the highest reading vacuum wise. repeat this for both adjustment screws. As far as the timing, set your initial at factory specs and make sure you vacuum advance and or mechanical advance are working correctly. To much total timing is bad. Make sure you remove the vacuum hose from the distibutor and plug it before setting you timing.

thanks for the help.. I think I'm gonna be able to get to that today. Actually looking nice outside.. yay!

let us know how it turns out, or if you need more help.