hey shoebox,
i used a set about 2 years ago on a customers car,he wanted it now not in two weeks.poor quality,came undone and threw a couple of pushrods - twice - whilst running the cam in.first time thought maybe i was faulty - second time i replaced them.adjuster screw locknuts wern't square to rocker adjuster ball showed wear/flat spots.this was with a purple 528(?)cam.
i run Crane golds in my motor,put Hughes rockers in the customers motor
the supplier did come to the party and refunded on them after a little argy bargy
good luck
Tex