Well, the 1st thing is to go to rockauto and order about 40 plugs because every time you takeaway timing from a cylinder it gets a new plug. Not knowing what type of fuel system you have, so i not sure how much individual cylinder adjustment you have.
It's a lot of fun to play with but it might have been worth .02-.03 at most.

Joe


Without Data, you’re just another guy with an opinion.