G,
I did some research this morning, looks like I have the Holley 4150 Carb. I'm going to run to the shop this morning to pull more #'s off of it now that I know where to look. Still wondering about that intake - shouldn't have this engine come with a 4bbl intake to begin with? Don't know why they'd swap out for a 58 model - if that's truly what I have. Looking forward to hearing from you!

Chris