While you have the head off and apart, might as well lap the valves before reassembling them. A suction cup on a stick, some valve grinding compound, and liberal elbow grease does the job. There are bunches of youtube videos that show you how to do this. I used some Dyechem to stain the seats blue so you can see how good the valve is sealing.
Here is a before and after showing the nice clean circle the valve makes when it's contacting the entire seat. I got lucky and all seats are in good shape and should seal well. If you have nicks or high and low spots you will need to have a machine shop cut new seats and angles on the valves. I had this done to a previous set and with surface milling, was out the door for $240.
After lapping on the left, see the nice shiny ring around the seat? I had also bead blasted the heads, and the best way to clean up after blasting is to pressure wash or put the parts in the dishwasher! Just don't try baking your powdercoating in the kitchen oven, everything you cook will taste like paint.
A fresh coat of paint and we're ready for reassembly!
