Header advice needed

About a year ago, I was working for a fellow who insisted on putting those heads on a 340 in a 71 Cuda strictly for street. And this guy mostly, probably 95% of the time, putts it around.
Any way, boy was he in for a surprise come header time. He searched for weeks and came up EMPTY. We finally bought IIRC a set of Hookers and cut them up, and made them fit. Then we fit them in the chassis. More cutting, welding,hammerring, etc. When we were all done we cleaned them up and sent them out for coating.
-To their credit, that combo, with those heads made 497hp with a 237*ish cam. Well, I should say, he told me thats what it made.