I don’t see an issue with cooling. IDK
I’ve never noted an angle plug. This maybe, IDK.
The head flow is the same for its series number. Valve size aside. If you have the bucks or can do it yourself, they accept larger valves easy and port out very well. 300+ cfm, no problem.
What exact head are we dealing with here again?
Sorry, I thought they were 452’s. Which now that I RR read the thread was never mentioned. So we are both off track.
The head is capable of 400 hp