Review on Holley 37 1542 Vacuum Secondary Kit by John Hickey

all the parts I needed. But since my experience with everything was holly, the instructions, diagrams etc are really bad. The kit includes parts for a variety of Holleycarb models with no parts list to determine which to use. For example, two pairs of needles and seats were provided that look the same but are marked with different part numbers. Holley's website was useless in determining what to use for my application, so I had to guess.