Thanks for your input, sir. I'll take my chances; if not sold I'm keeping them for my engine anyways. They were removed from a mid-12 sec factory disp. 340 Duster. I'm pretty confident in what I have.
"Stock" heads can get you faster than that, watch g stock sometime where they're runni g 10.8's and 11's , fwiw.
How about pictures of the port work done?
