Friday, September 5, 2025

Replacing the 351W in the '68 Mustang Part 5

I'm writing this update after a whole blissful weekend of tinkering with the '68. However most of the first day was spent working under a couple of spotlights due to those nice people at PG&E deciding to switch off our power for the day. 


The only reason I have any light is that we have a generator - we have fairly regular power outages, and we need to be able to keep the freezer and the sump pump running. The generator can run off gasoline or propane; it produces more energy from gasoline, but I prefer to use propane since it is easier to store.


First up was re-installing the radiator, the overflow bottle and the fan shroud: 


Then the chrome-plated water pump:


After that I attached the chrome-plated alternator and the supporting bracket, the pulley that goes over the water pump, and the radiator cooling fan:


Studs were threaded into the four corner bolt locations at the cylinder heads for alignment of the intake manifold:


Intake manifold installed:


Re-connected the heater hoses and the bypass hose:


Re-installed the radiator hoses and the ignition coil:

For some reason the car never had a grounding strap on the alternator, so I fabricated one from some 4 AWG cable and installed it:

Re-installed the battery and re-connected all the under-hood wiring. The power to the house/garage was back on by the point when this photo was taken:

I recently rebuilt the Autolite carburetor out of my '67 F250, which was an interesting mini-project and helped me understand much better how this type of device works. I'll link to the related post when I get around to publishing it. The carburetor from the '68 has been sitting "dry" for almost a year. What's more it has been over ten years since it was rebuilt, so what the heck, let's do it!

The Mustang is equipped with a Holley 4160 which was in much better shape to start with than the Autolite 2100 which came out of the truck: 


The Holley has two (2) separate fuel chambers and two (2) independent floats; these parts do not need cleaning:


The main body of the carburetor was soaked in the same cleaning fluid as the Autolite:


The lower section was too big to fit into the can, so I cleaned it by hand with an old toothbrush and some spray-on carb cleaner.


After cleaning and drying/blowing out all passages with compressed air:


The 4160 was rebuilt with a Holley-branded kit and I used this tutorial for disassembly and most of the rebuild and this one for some of the finer points of the rebuild. Which gave the photo below.


Re-installed the 4160, and reconnected the incoming fuel line and the throttle linkage:

To be continued....

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