Did you happen to cc your heads yet? I did a set of J heads yesterday, dae matched off the same motor and one head is 4cc off from the other and far enough off im going to use offset dowls on one side.

The good side on the open part of the chamber I can take .110 out to make the chamber round to match the bore which will net a good bit.

I mentioned doing it with the head on the block but you can do it with a gasket and felt tip marker and going with the inside of the line vs the outside.