The old Pro Power (?) headers used a tube thru the inner fender. I can't remember the name of them for sure, and they disappeared for a few years. I believe the guy that runs Chrysler Power has brought them back. You might check with them. I do NOT know if they'll work with power steering, I suspect not.
Mine that have one tube thru are ancient hooker adjustables for a big block in an early b-body. I think the hookers for the swap used a tube thru the inner fender too.
To be honest, I think if you want to retain ps with a big block a-body swap, schumaker tri-y's or full fenderwells are your best bet.
