what turbo headers for a 318?

Check out my build. Single GT45, E85 and the Fitech unit, mostly stock 5.9.
I think you can avoid some hotside fabrication headaches going with twins, but it will present challenges on the downpipe side. You could go super simple and just dump the downpipes in the fenderwells.

That was my thoughts on small twins also. Two into one intercooler simplifies even more fab on that side at least also.

I figure worst case on the hot side, I can run them under the k, and pretty much be a traditional "header back" once you get past the firewall. I have a buddy with monster 2.125 tubes with a sb. one tube through the fender. I imagine if those fit I can fit a single 2.5 downpipe somewhere out the rear.

Only goofy thing I see with the sbc headers is they appear to point the turbo east/east opposed to north/south. So a cone filter would point inward/outward. Opposed to forward. If im looking at it right.