Mark I've run 2 different BLP's and had really good success with them.
I don't have the invoice, but do have the build sheet for the carb that was on my old 548.
Model # 40365DL
Ser# 13699
The Big Bo looks pretty sweet. Some of our Pro Stock guys run it. It's a good carb for our Pro Stock class because we only allow a single carb or 1 split carb. The carburetor use to be limiting factor, but now there are several single 4 barrel carbs (or big 1 barrels like the Big Bo). that can support 1,400+ hp