Suggestions on performance upgrades for 225

I'll just chime in from the 4bbl camp...I have an Offy intake and a holley 390 on my '68 and am very pleased with it. Admittedly I don't have to deal with aerodynamics quite as much as that beautiful a100, but my car will cruise at 70 all day long and get about 17mpg doing it. That's with stock everything and 2.76 gears.