This pump uses the 5/8 keyed shaft for the pulley. This has a beautiful chrome finish.
This kit includes an Aluminum Machined power steering pump pulley. This is a single groove pulley that fits all GM key-way power steering units through 1984 with a 5/8 Shaft. This pulley is Constructed of thick gauge aluminum and with a high quality Satin Aluminum finish. Additionally, this comes with a power steering pump bracket for your 1970-Later Small Block Chevy Engine with a short or long water pump.
This quality bracket fits a wide variety of applications due to its optional low or high mounting positions. The power steering bracket mounts to the front of the lower driver side using the 2 lower bolt holes located by the timing chain cover (the old front mount holes). The adjusting arm mounts to the lower water pump hole. No drilling or tapping required.