Sedanman
67-9 Valiant specialist
I have the original 273 drivetrain out of my 67 Valiant with 920 heads but 2bbl. I have a Edelbrock sp2p and a weiand action plus and both have the smaller 273/318 porting. The Weiand is actually on the 340 that is in my car at the moment and will be getting swapped out for an air gap. If you had to choose which would you keep for a mild 273?