OP...605ply nailed it. You don't need lash caps. Almost never. Lash caps will make it worse.

It's criminal that HS and a host of other either lie about your issue or are just ignorant. When I was younger, I thought they were lying. After 6 decades of life, I now know they are mostly ignorant and just don't give a single [censored] about anything but selling you junk.

You need a rocker arm geometry education. Go to the b3 racing engines web site link above and read his tech articles. Once you get an understanding, you can call Mike and he will help you fix your geometry and it won't need lash caps.

Your valve train will thank you. Mikes prices are so reasonable and his stuff works so well there is no excuse to not correct your geometry. There is no way that HS doesn't know about this, because I've personally called them. They just don't give a [censored]. A sad fact. If they actually gave a [censored] about you, the customer, they'd work with Mike to help their customers get the best. GM guys don't have to deal with this [censored]. Why do Chrysler guys put up with it?

If I sound a little pissed off over this it's because I am. There is no excuse for jacked up geometry. In fact, it's not really even HS' fault. Or any other manufacturer for that matter. They can't control the height of the rocker arm shaft saddles, or the length of the valves, both of which affect geometry. There are design details they can control, but those they can't

So skip the lash caps and the other band aids and call Mike and get your stuff fixed. Making the valve longer with a lash cap won't fix a thing.