I have a brand new 273/318 Offy intake that will go on my 360. Id like an Edelbrock D66 version but even theirs is for the 273- not to mention they have been out of production for over 30 years. Talking inline underhood dualquads the Edelbrock intake for the RB mopars is fantastic. (I had 2 440s with that setup) For the low deck the Offenhauser is available but I wonder if an iron OEM 383 dual quad manifold would work better. I was really disappointed at the results from the dual quad on the 383 that Dulcich tested a couple years ago. The setup was rather flat everywhere- outgunned by every other single carb combo.