I've a Holley list 4555 for the 70 LT1, which I acquired for my replica motor.
My issue today: I don't remember there being a ball in the vacuum secondary when I dismantled it (to ensure the carbie is correctly jetted, etc. [which it is]). But now that I've put one in from the Holley rebuild kit, the secondary seems 'sticky' when operated manually.
The carbie is not installed on my Vette yet.
And now I've put the Holley quick change kit on (with new diaphragm), and it seems even 'stickier'. Looking at the instructions Holley puts out for the 4150 quick change, it states the ball came with 'some' carbies.
All of which begs the question: should the 4555 have the ball in, or not?
Cheers from Down Under.
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1968E (2nd month production) convertible first registered California 1967 and a retired SCCA race car. It is still race prepped and built up as a '69 ZR1 (announced '69 but not built until '70); i.e., the L88 car with LT1 motor.