The dyno shop jetted it up a few sizes to 82 in front 88 rear. I don't remember what it was but I do recall it was lean before.

The carb is a Holley 4150 850cfm. It is not the 870 Avenger.

One of the issues I ran into with the carb was it had a really weird tune on it from the factory. Holley recommended it for my motor so I bought it. However, this carburetor is the same unit they put on the Chevy 502 crate motors so it wasn't configured like your standard Holley. Just weird things like 3.5PVs, super duper light vac secondary spring, etc...