[Aerocoupe]

I think it all depends on how much money you have to invest up front. The NOS will be cheaper than the SC setup for a carb...anyhow the ones I have seen are. Either way you will be burning extra fuel so that is a non-issue. The bottles take up cargo room, if it is a hatch car then you need to vent the relief valve on the bottle out the bottom of the floor board, etc. Setting up a carb based blower and keeping a tune on it can be a pain versus a mass air injected setup. All in all I think it would be go with what you know.

Why not just buy a 331 kit and bump the compression? Same cost and it is always there. You can find a used roller block and basically build the short block. It would take a weekend to swap all the stuff over from the 306 and then you could sell the 306 short block.

Darren