Another 302 head question

Mike, you don't have to drill and tap if you can weld, otherwise, purchase the drill and tap as a set from the tool house or sears etc.... and the allen scews without heads. Drill the hole about a 1/4 inch longer than the allen stud to be used. This way, after you tap the hole to it's end, the allen stud can be slightly counter sunk but not bottomed out in the hole. Lock tight it for good measure.

The length of the allen stud should be kept to a min. length. There is plenthy of room to drill for a long stud, but why tire your arms out for a inch long stud drill and tap session for 8 holes when a shorter one will do?