Small block 426 stroker with trickflow heads. How much HP.

I havent either. But I figured you or some body on here had. I am stuck with the 1-5/8 headers for now because thst is the biggest comp makes them for a first gen dakota. Now I found a place that makes 1-3/4 and 1-7/8 for a 97 and up dakota. But don't really want to spend a 1000 on headers not knowing if they would fit my 96. Also I wasn't sure if the trickflows would flow enough for the hp I am looking for. I think I read some wear that the gen3 hemi eagle heads I have flow over 320 cfm stock. I might just have to give up on the magnum stroker build and start buying more gen 3 hemi parts. Lol
Man! I hear ya there!
The general layman’s rule of 2hp per 1cfm flow is good only so far. As PRH said......

It is kind of like.... the flow rate of 300cfm through the TF port we will change to 300 people through a highly developed ergonomically contoured door. So many people can get through the door.
300 people single file through the door per minute.

Now if we open the door to a 2 person door wide door that still moves 300 people per minute, more people get in.
W2-5, Indy, Victor, etc

If you had a big block, the door is triple wide.....
3 people wide at 300 people per minute.....