Upgrade your 73-87 Chevy or GMC truck to a 8 in. dual diaphragm power booster. This kit can be used to convert a manual brake truck to power brakes or used as a replacement for factory power brake equipped trucks. This 8" power booster is hand polished before a yellow zinc finish is applied for a top quality finish and the kit includes all the necessary brackets, hardware and pushrod components for an easy installation. The booster will work with factory style GM cast iron master cylinders as well as our many GM master cylinder options.