Quick question cam retainer bolts 340

IMO it doesn't matter. There isn't enough oil coming through that bolt to do anything. Technically, it goes into the hole that breaks through into the lifter valley.

I want more oil on the timing chain. So I drill a small hole in the cam plate where it covers the main oil feed gallery. That puts oil on the timing chain. Since I run a gear drive, I make damn sure there is oil on the gears and that's how I do it.