Holley 4555
Thread Starter
4th Gear
Joined: Jul 2025
Posts: 4
Likes: 0
Holley 4555
I picked up a Holley carb , 3972121,list-4555,032. Dont know if the metering blocks are the correct ones. The primary is 6333 and the secondary is 7003. If someone knows this information I would really appreciate to hear from you.
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,016
Likes: 4,371
From: Marlton NJ
You should check out this thread:
Almost the same date even
https://www.corvetteforum.com/forums...ted-035-a.html
He says 6333 & 4159
Almost the same date even
https://www.corvetteforum.com/forums...ted-035-a.html
He says 6333 & 4159
Safety Car
Joined: Dec 1999
Posts: 3,591
Likes: 830
From: PA
For your 4555, the primary metering block that you have, 6333, is correct. The secondary metering block should be 4519 (if I remember correctly), not the 7003 you currently have.
Regards,
Stan Falenski
Regards,
Stan Falenski
Safety Car
Joined: Dec 1999
Posts: 3,591
Likes: 830
From: PA
I can tell you that there a bunch of 4519 metering blocks for sale on eBay ranging from roughly $50 to $100… There’s even one with a starting bid less than $10. I’d probably pick one of those up and move forward from there.
Regards,
Stan Falenski
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