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Sooo..... Do you have specs on your engine build. Hard to provide areas to look at with only knowing you have a Cleveland with a 670 Street Avenger. My gut tells me that the intake wasn’t properly seated (ask me how I know) and that it won’t idle any lower because it has a massive vacuum leak...

I think you are missing allot of details, before you start randomly looking at causes for a high idle and engine stalling. A large cam will result in an engine that will not idle well. Poorly adjusted valves will result in a poor idle. A poorly seated intake will cause an internal vacuum leak...

I think you are missing allot of details, before you start randomly looking at causes for a high idle and engine stalling. A large lift, short duration cam will result in an engine that will not idle well. Poorly adjusted valves will result in a poor idle. A poorly seated intake will cause an...

If you are running a Durasprark or MSD distributor, check the magnetic pickup on the distributor. I had an intermittent issue with my 73 that I could not figure out. The car would run fine, and then shut off randomly while driving. When testing the resistance on the magnetic pickup while the...

If you are mechanically inclined, the FMX is a fairly straight forward transmission to rebuild.  Kenneth Collins of Bad Shoe Productions sales a step by step video series that walks you through disassembly and rebuild of the transmission, as well as sells some ofthe specialty tools needed for...

That weight sounds about right.  I used a floor jack to balance the 3rd member on, and then lowered it down very carefully.  The key is to get it to rest on the bottom of the bolt flange and ring gear while lowering it.

I have a FMX in my 69 Mach 1 and my 73 Mach 1. I rebuilt both of them in the past year. I have worked on cars for years, but had not rebuilt a transmission before. I ordered the FMX video from Bad Shoe Productions, and found it very straight forward. Ken is very knowledgable on the...

When I changed from point to Pertronix on my 69 Mach 1, the timing changed (advanced) and I had to reset it. I would suspect that the same happened to you as well. i agree with Barnett468’s recommendations.

I just converted the AC on my 69 over to R-134a this week. You can unscrew the the low pressure valve cap and crack open the valve on the compressor. It has a square shank on the end. Rotating it clockwise opens it.

Did he end up going with the Duraspark setup? Sent from my iPhone using Tapatalk

And the metal line that 73pony has pictured was missing on my car. Someone had used a high pressure line off of a 250, which will work without the metal extension tube, but rubs against the master cylinder. The metal tube that is pictured, I ordered from West Coast Cougar. They sell good...

I bought my replacement lines from Autozone. Wasn’t worried about getting the Ford part number for the replacement. They have worked great so far.

The tach was connected through the factory pink resistor wire. The resistor wire provided the 1.5 ohm resistance that allowed the tach to read correctly. I still have my wiring diagrams from when I rewired my car with a painless kit about 5 years ago with the Duraspark setup. Unfortunately, I...

I had The Duraspark setup on my 73 Mach I with factory tach. It worked great for years. I recently switched to the MSD 6AL and the tach adapter. Did you have a wiring question? Sent from my iPhone using Tapatalk

1973 Q Code Mach 1 Sent from my iPhone using Tapatalk

I used the universal painless harness on my 1973 Mach 1 after a harness meltdown and underhood fire a couple if years ago. It was allot of work soldering and heat sleeving the connectors off of the old wire harness from the old to the new, but it was well worth it. It allowed me to wire up my...