Quote Originally Posted by Ram 50 View Post
Did you ever find a fix I have the same problem with my truck any info would help
The 32/36 Weber isn't jetted for the G63B out of the box (selecting the correct jet sizes will make a noticeable improvement in power and economy). The Weber generates more vacuum than the Mikuni and as a consequence will over advance the distributor. It takes trial and error to get the engine running at an acceptable tune but if you either delete the advance (use a distributor off a 4G64 maybe?) or have the existing distributor re-curved you will make a ton of response out of it.