This was interesting, after a long wait (supply chain issues from Holley Days 2021) we received a new Holley carburetor for our C10 build. It’s for the second engine that’s been waiting its turn at Fastlane Machine (Our first rule in government spending, why build one when you can have two at twice the price 489.
). It’s an 850 CFM Classic with Electric Choke & Vacuum Secondaries just like the one I run on our K30. Well, that’s what I thought when I bought it but turns out Holley has changed that carburetor (the link below still shows the old carb). Materials, gold dichromate plating (not as good btw), main body, fuel bowls, wow you name it it’s a little bit different, reminds me of a gold Brawler carb. Is it a better carb, could be, it does have many updated features from the old carburetor.
https://www.holley.com/products/fuel.../parts/0-80531
Gave Holley tech support a call when we received it, they had no idea what was up and requested pictures. Below are some of the pics that I emailed them, my question was “Is this the end of the old-style Holley carb that I grew up with, is it no longer available?”
To date, I’ve never heard back from them and last week I did bolt this carb on our 489 for a break-in, dyno-tune session. I don’t want to get too far ahead of the timeline but the carb performed very well out of the box with only minor adjustments and a secondary jet change.
So that makes 2 for Holley, what is pictured may not be what you get. 1st was the clutch disk that came with our Hays clutch (link) and now this carburetor. Good, bad, or somewhere in the middle I’m not really sure, time will tell.
http://67-72chevytrucks.com/vboard/s...&postcount=251