butler is 6 months out to port iron.and it was 1900? (i may be off) and i had a hard time finding anyone who would touch iron heads. If you can, go aluminum. sounds like the valve stem seals may be bad or the guides most likely.
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72 Luxury Lemans nicely optioned 
Best so far 12.40 Milan Dragway 2025
I am the Thread Killer!
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