Dyno results from porting stock heads?

Does anyone out there have an actual dyno result, from porting the stock heads?
If not does anyone have an ET difference ?
Ex ran 14.50 ET @ 94mph, then ported the heads, did no other mods and picked up 2 tenths...

Thanks in advance for anyone with actual results.
I am trying to avoid the typical " I make 300hp at the RW with the stock heads, they are just fine"

Or also "Just get a set of AFR's"
Thanks

Thanks for the post dude
Muchas Gracias