Are these good rockers?

[Brass]

Just curious.  I was browsing and came across these:

http://chucker54.stores.yahoo.net/benalro.html

1.6 intake and 1.5 exhaust.  When would you use something like these?  I'm wondering how they would perform with a split-grind cam that could benefit from a little more lift at intake(?)

Comments welcome and thanks!

[Kern Dog]

Those look like the set I bought last year. They are made by Harland Sharp but instead of using roller bearings on the rockers, these are bushed. Mine have 2500 or more miles on them with no problems. The lash hasn't grown a bit. The adjusters do not loosen up. I say GO for it.