Re: How do you port and polish
You should be able to remove your plug with an open end wrench, I have done it on mine. You can replace your stock plug with a champion L78C, I believe it is shorter.
Good save on the cylinder studs, just make sure they are torqued to about 15 ft/lbs.
I don't recommend replacing your engine mounting and intake and exhaust studs with 1/4-20's but I would recommend replacing your stock ones with good quality 6mm ones. That goes for all of the nuts too. If you can't find 6mm studs you can get 6mm bolts and cut the heads off. Just make sure you get the correct length.