replacing valve seals on a 318 procedure?

MOPEkidD-3:
You funkee Homosapien!

needsaresto:

Good thinking on the back pain, hadn't though about that. As I'm supposed to be operated on my back for a herniated disc (L4-L5) in the coming months these are things I have to take into consideration.

I was also thinking, while the heads are pulled I'll have a machine shop plane them and I can flow them as well. The more I think about it the more I want to go this route.

Any recommendations on how much to take off the head (Rumblefish?), say a happy medium between raised compression and no compromise of head integrity? I'll be replacing the cam with a 340 spec cam and the timing chain with a double if that's of any relavence...