I've had a customer messaging me back and forth about using Trick Flow heads on their FE.
I've used several sets of these so far and the issue is the same: the stand height is raised about .300" higher than a factory head. Their included valves are longer, which helps a little, but you still end up with a net .200-.250" height difference.
My customer decided to call Trick Flow to inquire and they told him that there is no issue as long as their valves are used.
Guys, this is absolutely not the case and if you follow their advice, you may end up with horrible geometry with the rocker arm riding the exhaust side of the valve tip. I know several of us have harped a lot on this, but my fear is that a lot of guys are gonna have premature valve guide wear if they don't bird-dog things on their own.