Are the repro carbs worth buying? Are they reliable out of the box? Or do you have to open them up and make adjustments?
NO, Holley had gone to carburetor hell, (Except for the 2 end Carbs I bought) Those work fine even 6 months later.. The last 4144-1 center carb I ordered back in Dec of 2020 was nowhere near "Wetflow Tested". Can't install even an OEM choke kit onto it due to them basically using a 4365 end carb with a center carb metering block. I took it off and rebuilt the original 4144. Havent had a problem since.. So I just had to eat the $800, and use it for parts.
Since, with Holley? You only have a short window to return it!! Only thing they'll do is RMA it back and "Act" as if they've repaired something. Very disapppionted with em. Considering the company's been sold 2-3 times in the last 9 years?
I think this is why many are going to injection. As long as I have my original carb I'll never use F.I. (Being a "Purist"). Not really even a need for a choke on a 6 pack car I.M.O.
But yeah, I'd avoid anything New Holley, except for their 4365 END/Outboard carbs. The 2 I did FINALLY receive work great.