Questions about head work.

Thanks.
yes the ports in my pictures are what I'm starting with. (Untouched) I also have 1.6 in valves for the ex as well. Do you think it would be worth while to mark the port with marking out blue, and scribe a 1/4 line below the seat face with jenny calipers to give me a line to blend to? Unfortunately me crappy cell phone pics don't really show just how big a waist there is on the left side. Even leaving in that small part above the seat face, there is quite a bit of meat to remove.

As for the guides, does anyone have a part number for some with a .530 OD to match my seals? I perhaps neglected to mention that my camshaft choice requires dual springs, so I'm stuck with using the teflon seals. (Engines that puff on start up give me the screaming sh!ts)