Lifter & Spring Questions

[Russ/40]

My memory fails me these days, but is there a definitive answer to the question:
Is it safe to use the early stock Ford lifters with the small foot of straight valves? I'm using Chevy valves and grinding stems for a valve job on my V8. I remember there were fears that the smaller foot of the valves may work their way through the early lifters. I suspect this is nonsense, but maybe I'm wrong - can't remember. The lifters are the hollow ones.

Also, what should the installed height be on stock springs with a Isky 77B cam? Which set of keeper grooves should I use. The short one or the long one? I realize the installed height should tell me....

Please and thank you!