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Originally posted by Cab_Burge
OP, the 915 heads came in two different versions in 1971 to 1973, big valves on the 1971 340 motors and with the smaller valves on the 1971 to the 1973 360 and the 1972 and 1973 340 heads.....


Thanks for that... very helpful.

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.....they were not set up for non leaded gas also


Lots of heads of that era weren't it's almost a matter of course to get hard valve seats fitted in anything that age here.