Magnum heads worth the effort?

So I guess it's back to how much difference would the mag heads make? If it is 30 to 40hp more that would be great and worth it to me. It would certainly be easier to just change the heads, intake, etc. I think could get it all done for less than $1k vs $2k and more work for changing to a 5.9 with cam and heads.
If you LA heads are stock, you'll see a gain.
So cool $699 and I guess we should at this point mentioned since it took you hours? Possibly days of grinding? I know you like to talk about flow so just in your wildest best guesstimate what do you think those are flowing?...
IDK. Honestly, if I gave my speech on this it would derail this thread. But let me say this, my original plan, 3 years ago, was to put the 318 magnum in my '74. These heads were going to be direct replacement and I was only to have 300 into them. These were NEVER bought with intentions of going on a LA. Things change, you know that.