I'll need to check, but I'm 95% sure the rockers have a hole that is pointed at the roller/valve tip area.

You can cut them shorter with a cut off wheel. I put mine in the bottom of the pushrod. That way you could keep an eye if they ever moved upward. Mine have never moved.
Doug

I tried the 5/64 pins on another set of pushrods I had just to see how it would work. First, yep 1” is way too long especially when the fit is as tight as it is, so Stanton’s question about the length was a good one. I got one about 1/4” in and it’s not coming out, so I will likely cut it off. I am having a heck of time getting something to fit, of course I am ordering off Amazon so that is probably most of the issue. The 5/64 pins were .086 but the gap was only about .005-6, so that is why they were not going in. I tried 2mm, which should be the same as the 5/64, they had a better gap but still very very tight going in. I when I measured them they were .090, with closer to a .10-.15 gap. I then thought if the 2mm were that far over spec then maybe a 1.5mm, may actually be worth trying.

When I go to actually put them in the pushrods, I will likely heat the pushrods in a sonic cleaner and try to chill the pins in the fridge.

I think we have a winner. These were from Amazon but were “The Hillman Group” brand and are regular steel, whereas most of the others have been stainless steel. They fit into the starter tool and went in with resistance but went in. I think they were around .084 and had about a .017 gap- once in they left a .041 orifice. I do think the 1/4” is probably about the right length as it gives you the ability to use a starter punch for a few hits before moving over to an actual punch. This info is all for the next guy.

Just FYI

https://youtu.be/L5zH-ReboTk?feature=shared