Weber Jets
Wayne:
The jets in my 3.5l were 45 idles, 142 mains and 185 air when I bought it from TJ at sea level. It has a 282 cam and mild intake/exhaust porting so the first thing to change would be smaller main jets and treat the idle jets as a separate issue using the Weber "best lean idle" proceedure.
Best thing to do would be finding somebody that tunes with a portable wide band gas analyzer and better yet a dynopak248 "rolling road".
The car lives at 4,000' and regularly drives between 3,500 and 7,000'. The idle jets are 50, mains are 130 and the air jets 220 so you can see what altitude changes in getting the correct mixture. This was done on a dyno with a wide band and the engine runs very well but there is a noticeable loss in power output over sea level.
