Tunnel Ram Carbs for 383?

I emailed Holley to see what carbs the recommend for my 383. They replied with the: 0-1850c vacuum secondary.

Anyone using these carbs? Or what carbs are you using with a tunnel ram?

Just not sure how tunable these carbs are, I'm going to try and get the most out of it possible.

383 specs:
Mopar purple solid cam: 284 duration, 0.528 lift, 110 Centerline
Ported "906" heads using MP templates
10.0:1 compression
1.625" or 1.75" primary pipe headers (haven't decided what size yet)
A-833 transmission
Weiand Hi-Ram Tunnel Ram
HEI ignition system
Wideband O2 sensor