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1973-87 GM Squarebody Truck LS Swap and Conversion Parts for Sale

Looking to LS or LT swap your 73-87 Squarebody Chevy or GMC truck? PSI can get you set up with everything you need to get your ride 'Wired up and Fired up!". From our Harnesses Made in the USA with high quality wire and different loom options to suit your needs, Our PCM tuning service where we can get you set up with a base tune for your engine and transmission, Engine & Transmission Mounts, Dakota Digital gauges, American Autowire Chassis Harnesses, Vintage Air Kits, Accessory Brackets, Oil Pans, ETC. 

  • 1979-87 Chevy Truck RTX Instrument System

  • 1973-87 Chevy/GMC Truck VHX Series Gauge Cluster

  • 1973-87 Chevy/GMC Truck HDX Series Gauge Cluster



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