I had violent fluctuations before I installed a needle valve in the line going to the fp gauge. That calmed it down.

Brad

 

Have the blue and big line kit as well. Also still have the factory lp still on the block. Idles at 25 can pull it down to between 10 and 15 at full throtle. Funny thing is the holley is on a toggle switch and sometimes if i turn it off just for the heck of it, It will read 15 for a few secs then slowly fall to nuthin. Just my exp. When the holley dies it will be time for a real pump..FASS

 

got it here with all fittings needed

http://www.vulcanperformance.com/ser...gulator/Detail

got it set between 17 and 18 idle.
Driving it gives a constand 15 - 16 lbs at pump