Idling problems

have you replaced the intake?

be more specific by what you did, as 'built u' is very vague.

it sounds like a vacuum leak and maybe an improperly adjusted kickdown.

whats the specs on the cam

The is the vacume line to the modulator on the transmission hooked up?

I think CraigMBA nailed down your problem to a T. That particular vacuum will cause your car to stall and affect shifting if it has a major leak.

The modulatar is located on the passenger side of your transmission body just before the trans. mount. It should have a short length of hose comming from it connected to a steal tube going up to the carb, follow it up and look for kinks or breaks. I have a 68 inline 6, mine connects again in the engine bay to a larger steal vacuum line that goes straight to the intake body below the carb. Check yours out and let us know if that was the problem.

Your kick down lever is on your driver side of the trans., connected upright to your neutral safety switch (has the wirers going to it), the lever has a very thin steal cable that connects it to the accelerator rod. There should be at least a 1" plus drop in this cable. The cable should only pull the kick down lever forward when your accelerator pedal is almost to the floor, have someone check that with you also with the engine off.

I don't know your expertise on these cars so I explained as simple as I could.

CraigMBA said:

The is the vacume line to the modulator on the transmission hooked up?

Click to expand...

I don't think it will up shift if the vacuum line is not hooked up