What to do??? Any suggestions???

I would sand them down,get rid of casting flares/flashes and any extra material on them.Sand off any production numbers etc...Gasket match the ports,and try to get them ported as far back as possible,and polish the ports.Then have the exit opened up as much as possible(2-2 1/4 inch would be great!)by a good machine shop.Paint it with some high temp paint of your choice and stick them on!

I did this with a stock slant six exhaust manifold when I went super six on my first Dart,looked really good. I think the porting/gasket matching added a few ponies too.That thing had ALOT of extra material in it.I was able to open the exit up to just a little over 2 1/4 in. safely.I have never dealt with SB exa. manifolds,so I am not sure what you can do there,Ive always gone with headers.