Will these work on a 1991 chevy c3500 with 7.4? I have them on there now but want to add new ones since I changed everything new

These are for retrofitting an R12 system to r134a. If your vehicle is already the r134a system you can replace the valves inside your fittings.

Do the high side adapters have valve cores?

Yes, each fitting, including high side, has a schrader valve.

my nissan 1988 300zx hi side access port can be either 3/8-24 unf or 7/16-20 unf. does your item accept both? either?

Most R12 service ports are 1/4 SAE flare . Theses adapters go from this 1/4 SAE to the 3/8 suction adapter on your gauges and the 7/16 goes on the high side 1/4 she service port.

Is this supposed to fit 1988 Camaro. It does not?

It didnt fit my 1992 jeep either.

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🚀 Upgrade Your Ride with Ease!

DURABLE DESIGN - Crafted from corrosion-resistant metal for long-lasting performance and reliability.
COMPLETE PACKAGE - Includes all necessary components for a hassle-free conversion, plus anti-dust caps.
SEAMLESS CONVERSION - Easily retrofit your A/C system from R-12 to R-134a with this comprehensive kit.
UNIVERSAL COMPATIBILITY - Designed to fit most vehicles from 1976 to 1995, ensuring broad application.
USER FRIENDLY INSTALLATION - Quick and easy installation with a simple screw-on design and protective cover.

The Mudder 4 Pieces VA-LH11 A/C Pro Retrofit Parts Kit is designed to convert R-12 air conditioning systems to R-134a, featuring a low-side 7/16 inch port, a high-side 3/8 inch port, and two adapters for seamless integration. This durable kit is compatible with most vehicles manufactured between 1976 and 1995, ensuring a reliable and efficient upgrade for your A/C system.

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Manufacturer	Mudder
Brand	Mudder
Item Weight	2.71 ounces
Package Dimensions	2.7 x 1.8 x 1 inches
Country of Origin	China
Item model number	Mudder-Retrofit Parts Kit-01
Manufacturer Part Number	Mudder-Retrofit Parts Kit-01
Voltage	12 Volts

Mudder 4 Pieces VA-LH11 A/C Pro R-12 to R-134a Retrofit Parts Kit Retrofit Conversion Adapter Fitting Compatible with 1/4 SAE Thread Low High Side Conversion(Bright Color)

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