SM Head Modifications on a budget

Earlie A said
I bought Drill Hog brand drill bits to drill the holes for the 9/16 and 17/32 brass tubing that you recommended in your old thread. One of the two sizes was difficult to get in the hole and I would be concerned about scraping all the epoxy out of the joint when inserting the tube. Is there a way to peen or solder the ends to make sure they cannot come out. In the case of the oiling head bolt tube - if the brass even rotated in the bore it would be disaster. Or does drilling for the oil hole automatically create enough damage to the brass to lock it in place?

Ok as promised here are some pictures. I tried the 220 grit first and it was very very slow but would be a nice finish. Then I bought these 120 grit (5/8) which when used with transmission fluid did a nice job. But it could still go quicker so when I looked this up for you I put a 80 grit in my cart. Here’s some pin gauges that you can buy separately to quickly check guide clearance and some clean up buffers.