Take a look at my lapped valve seat please.

zukdave wrote: Put the valve and spring back in and spray carb cleaner in the port
if any run's pass'd the valve it ain'f seating.

I filled exhaust port with brake cleaner and let it sit for a bit and there were no leaks.

Lapped surface looks too narrow to me, but I am a car engine guy. Pitting is too big. You need more lapping or machine shop.

Is that a crack at 3.30 on first picture? Take a magnifying glass and high resolution picture. I increased your picture 400% and could see 2 cracks next to each other, I think.
Lap as long as needed, you'll check clearance later.
I could only see crack on picture of Jeep head.
I almost never bring heads to machine shop, I lap by drill.

Motor Head wrote: Post up some pictures of the Valves, showing where the contact patch is and the width. You want that as close to Center as possible, and within the spec for the width. For cheap Bluing Compound, you can mark the valve face with a Black Sharpie and then see where the contact area is.
You will more than likely need to re-shim, as you were probably already close to the min on clearance.

You read my mind as I was going to say color them with a sharpie or felt tip marker and then lap them again and you will see what's going on.