Gotta love rules interpretation. I take "factory" heads to mean that the casting needs to be supplied by the factory and open to modifications of any sort.
Then again, who's "factory" does it have to be..........
I take "stock" heads to mean they should look stock in every way on the outside.
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97 F350 4X4 CC Dually 5spd 24V 913 S300/HT3B Ranch Hand.
Playtoy-Oliver 1655. 12V now , 13mm, S475
Wife's ride-03 Excursion 12V swap in the works.
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