Headers on stock 66?

Want to install (and buy, if you have 'em) long headers in my 66 signet. 225, PS, PB (soon), stock trans and engine. For now I will be running them with the stock one barrel carburetor and intake. Down the road I would like to have a hyper Pak intake. What do I need to know? Will I have to use short headers because of the power steering? Thanks guys!