Whether you were able or not able to use the 305 head is irrelevant.
Am I not recaling the other thread correctly? Everyone was all about the 265 making more TQ and power than the 305 irregardless of application on eleachs motor.
Now that the facts are out lets spin the story?

Lots of opinions here, not so many dyno sheets to back up em up.

I'm not following your comparison?

Thanx for the lesson Wally but maybe its not as much as you think. I had to go with catch cans this year , the tall stepped Teague stepped breathers were still making a mess. My Iron Head 345 Dart 540 blow by motors made shy of 900hp.
I`d like to see some dyno sheets to prove your point.. probably not going to happen. I can show you mine if you`d like.
They use about a quart of oil /weekend.

its quite easy to reverse... plug the hole in the side of the power valve port (side of carb) and open the power valve port in the base plate... presto change-o no longer a boost referenced carb

You aren't recalling correctly, I never said that the 265's would make more hp.

Ealesh, I looked up the bearings I rebuilt my blowers using. The rotor bearings are rated at 18000rpm and the snout bearings 17000rpm. They have ran 5 years without rebuilding at 11800 so we know that is a good conservative rpm. It does look like 15000rpm is not going to make the blower come apart based on rpm. And to me the bearings are what would fail in order for a blower to come apart, aside from other indirect causes like no oil, fuelish oil etc. So I stand corrected on that. That being said though I can tell you when the weather gets hot/humid and the blowers are singing, heat comes on fast and starts chopping off wot speeds and power in a hurry. You can actually hear the pitch of the whine change when they get hot and I need to back off. That will only come on quicker spinning the blowers faster so it will be interesting to see how you fair at 14k+rpm. I am planning to go to 12100rpm this summer and am pleased to figure out I'm not getting as close to the edge as I was thinking. Are you a chesepeake bay boater?

Put that 177 on a steady state dyno pull at 6,000rpm, and you'll see that peak power drop big time. The case gets so hot the rotor clearance goes to chit.

Yea man I definitely could tell on a hot humid day the difference, it has a pretty decent effect on these engines. Hopefully it will be a little less with making good power on motor vs being so blower reliant.

Yea I am a Chesapeake bay boater, I see your in PA, you boat on the Chesapeake too?

Well maybe Marks will, my blower is looser, should definitely run cooler

Sounds like a good candidate for some R&D of a "marine" engine diaper.