1979 Chevrolet C70 Conversion to OEM Air Conditioning

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Shortened the frame back to its original wheelbase (203 in).

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Been going through the brake system replacing wheel cylinders and hoses. I have also taken the opportunity to strip and prepare to repaint the Dayton hubs. I have new tubeless 11 - 22.5 rims and radial tires ready to be installed. I wanted to keep the original 9.00 - 20 rims, however radial tires for them were almost impossible to find and very expensive. I know in the long run the tubeless is a much better option.

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Continuing to make progress on the brakes. Front brakes, master cylinder, and hoses are finished. The passenger side rear is ready to have the drum reinstalled and it will be finished.

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New front brake lines:

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Can anyone tell me what the sender on the Secondary fuel filter does? It has a single wire going to it. I assume it applies a ground when the pressure reaches a given threshold. I have grounded the terminal and do not get any light showing on the dash. I have reviewed the wire schematics and do not find any information about it.

[gmtech68]

On our 8V71 's at work it is connected to a circuit that allows the engine to stay running. No fuel pressure; shuts off. However those engines have a Woodward hydraulic governor. Yours does not. May also be used as a "run" circuit to send power to various things to signal the engine is running. It has been a while since I've had to mess with that engine. Pretty reliable.

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Finishing up the last brake. Here is a picture showing my sons Micah and Noah learning how to reinstall the rear brake shoes. They were fascinated with how the brake spring installation tool worked. In this picture they are installing the lock rings on the brake shoe retainer castle nut.