Thanks. I am thinking about using headers too, I looked at Doug's headers 1 5/8" they are pricey but seem to be a quality header. A friend of mine has them on his 360 in a 1974 dart sport and they fit good.
From the few times I have actually seen them and spoke to the owners of them, they looked very good in there and the fit was given a thumbs up. Everyone still bitches about installing headers though.
I think 3.55’s are pretty good street gears good to go most anywhere. They will still rev a little high on the Hwy/Interstates, so it’s OK for a little while IMO, that’s just me.