Got word from the head shop that the exhaust valves need replacing as part of overhauling the head. Sourced these from Eric at Hi Performance Auto out in California. Great guy to do business with. Will be installing new bronze guides for both the intake and exhaust valves at the same time. The exhaust valves will get back cuts, and all 8 valves will get a three-angle valve job. The head will also be skimmed in search of compression.