Decking the head and port tips?

[Tashka]

My head gasket is leaking oil, so I think thst the problem is that the bolts holding the head on are loose. since I would be pulling the rocker assembly and tank to be able to tighten, I thought I might aswell do some port work and to deck the head while I'm at it.

What did yall guys use to deck the head? Did yall take it to a machine shop and have it done, or did you use a miter saw or something?

Also any tips for porting? I know to go slow, more is less,
cover the valve seats with duct tape. Any areas in particular that might need some cheerfulness and special touch?

I've never ported or decked a head before. I am sufficient in the use of power tools though. I'm On the quest to hotrod my hawk, lol