And so it starts... 340 build

What forphorty said X2 core sand removal hole plugs (also why the bigger figure 8 holes in the late 440 decks)
but we still do not want them popping out
NO SILICONE
there is a difference in leak proofing and pop out proofing
I like to use ductile top rings to hold off detonation results for a little while but detonation will break anything
and I do not think I'm the tuner that IQ 52 appears to be- but tune tune tune