I received the power brake kit from Zip for my 1975 corvette from an astute family member, but I had questions about how they stacked up to original brake lines and how they would score. Generally, the bends are "close enough" that some minor tweaking can get them to match the existing. Where I noticed the biggest differences were the colors of the fittings around the proportioning valve and master cylinder, and the armor "style." My original brake lines are my only sample to which I can compare. Below are some pictures comparing the old and new fittings, as well as the armor.
Front master cylinder brake line (master cylinder fitting) - The line fitting from Zip is too green. Original fitting is more of a blue-green.

Front master cylinder brake line (proportioning valve fitting) - I have a hard time determining if the original fitting was green, or left a natural brass color. All of the original fittings I looked at retained their color on the thread, I have a hard time believing this one fitting lost all its color. Also, the other master cylinder brake line left the fitting that connected to the proportioning valve a natural brass color.

Rear master cylinder brake line (master cylinder fitting) -The fitting from Zip is too light. I would describe the Zip fitting as a UNC blue, and the original fitting as Duke blue.

Rear master cylinder brake line (proportioning valve fitting) - Fittings appear to match as a natural brass finish.

Proportioning valve to rear brake line (proportioning valve fitting) - Same blue as the rear master cylinder brake line (MC fitting). I would describe the Zip fitting as a UNC blue, and the original fitting as Duke blue.

Front right brake line (proportioning valve fitting) - The purples appear to match very well.

Front left brake line (proportioning valve fitting) - The purples appear to match very well.

Front master cylinder brake line - Armor too short

Rear master cylinder brake line - Armor too short

Up-close armor comparision - The armor is too spread out, and from the previous armor pictures, it was already too short.

I have not attended an NCRS judging event yet (the national convention will be my first), but I would expect there would be a deduct for the incorrect fitting colors and the armor not being completely correct. I would love to hear the opinions of those who have judged the 1973-1977 mechanical section. At this point, I plan to use the Zip brake lines. If I miss a flight award because of a few points, then I obviously have many other incorrect items.
Front master cylinder brake line (master cylinder fitting) - The line fitting from Zip is too green. Original fitting is more of a blue-green.

Front master cylinder brake line (proportioning valve fitting) - I have a hard time determining if the original fitting was green, or left a natural brass color. All of the original fittings I looked at retained their color on the thread, I have a hard time believing this one fitting lost all its color. Also, the other master cylinder brake line left the fitting that connected to the proportioning valve a natural brass color.

Rear master cylinder brake line (master cylinder fitting) -The fitting from Zip is too light. I would describe the Zip fitting as a UNC blue, and the original fitting as Duke blue.

Rear master cylinder brake line (proportioning valve fitting) - Fittings appear to match as a natural brass finish.

Proportioning valve to rear brake line (proportioning valve fitting) - Same blue as the rear master cylinder brake line (MC fitting). I would describe the Zip fitting as a UNC blue, and the original fitting as Duke blue.

Front right brake line (proportioning valve fitting) - The purples appear to match very well.

Front left brake line (proportioning valve fitting) - The purples appear to match very well.

Front master cylinder brake line - Armor too short

Rear master cylinder brake line - Armor too short

Up-close armor comparision - The armor is too spread out, and from the previous armor pictures, it was already too short.

I have not attended an NCRS judging event yet (the national convention will be my first), but I would expect there would be a deduct for the incorrect fitting colors and the armor not being completely correct. I would love to hear the opinions of those who have judged the 1973-1977 mechanical section. At this point, I plan to use the Zip brake lines. If I miss a flight award because of a few points, then I obviously have many other incorrect items.
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