Not Ranked
I totally understand the delima of what CAN be done vs what really NEEDS to be done. Here on Club Cobra the advice almost always leans toward what CAN be done, spare no expense etc. There is a place for that, but not all of us are on a limited budget.
Heres why I would NOT worry about hardened valve seats:
When unleaded gas first came on the scene virtually a 100% of the industry recommended hardened seats, solid advice, but not needed for everyone. Turns out the valve seats are at risk when your driving a LOT of miles in a SINGLE journey. Keeping the temps up over a period of time is what kills the seats. Shorter trips, lower mileage are not so much of a problem. I would think that also applies to limited track use, run some laps, pit, run some more. Running it HARD and LONG? Use a lead additive in the tank for such conditions.
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