Late 80's swirl port heads 302/714's

We'll I was reading a post on RCC where one guy was saying that him and a buddy did a dyno test on a 318....took some pre 85 318 heads and a pair of 302 heads....I'm taking it they had the same guy just do a valve job on both sets of heads. Just a head change was 20 to 25 HP gain with the 302's.

But I have read also over the years that once ported they are so close to the same it isn't funny other than the 302's having closed chambers.

So if that their dyno thing is true or accurate then maybe their only better if not ported.....so reading all that just curious if ya down a gasket match on intake and exhaust would it hurt it?

I've also read that they (302,714 heads) are more of a velocity head.

I wish I was rich to do a bunch flow testing and dyno testing.

I was hoping some guys have been able to play with stuff here is why I was asking....LOL

So yes opinions are welcome....it's all for food for thought anyways.

Thanks everybody.
I would say with a mild 318, a set of port matched 302's would work well. If you're building a 400 horse engine, you could port the Hell out of a set and use bigger valves or just buy a set of aluminum's instead.