Trick flow heads how are they ?

pittsburghracer said
I heard rumblings of using a big block Mopar rocker. I think that would be a mistake.

yellow rose said
Yes it would. They need to develop their own rocker, put the stands in the correct location and get it so you can run 1.8 rockers. I knew I’d think of other stuff.

Can you guys elaborate on why it would be a mistake to use a big block rocker arm if they set up the head correctly to use it? Just wondering.