Max lift on stock guides and seals?

DaveBonds said
That's why I was curious. Maybe it depends on the head? Maybe not even the number, but actually the particular head. Hughes calls caution on anything above .450" on their website, but on other pages of their site, reference .500"

The heads that I'm checking are a 302 and seem to have somewhere just over .500"

I have a few different vintage heads that I'd like to check and see where it makes any difference.

I bent all 16 pushrods due to coil bind on a 79 360. The cam lift was 480 advertized with 1.5 rockers. It's been a while ago. I don't remember the heads casting numbers but they were originals to the 79 Engine. Moral of the story, don't take anything for granted with Chrysler engines.

Also, I just had a set of 69 X-heads re-done with new springs installed. They measured for 520 max lift.

Russ