AS for the 124 that was said to make 160.. Scott was talking a engine we built many years ago now.. I am always more than happy to explain that build. Side track here just a bit and in a nutshell this is the build as how it came to be.
That 124....it did run very well. Bike was a 2002 Duece ,... It was not the typical 124 bore and stroke though ,... build was a 4.250 bore and 4 3/8 crank with heads that Reggie from R&R repaired. I had heard about a shop up on the NW right coast, some dyno sheets with woods cams that made big power,.. so I had them do the port work the first time . Barn burner they said, will hit like a hammer in the basement and pull out up top... In the end the valve stem protrusion was increasing . Port work was not flowing what was stated also making a lot of noise in the heads .... Shop told me to grind the rocker arm to stop it from hitting the valve retainer ( one source of the noise).

Heads where boxed up and shipped to R&R cycle ..
R&R welded the heads, and they became a raised port version, welded combustion chamber new seats valve sizes that are large even by todays standard.
We ran custom rocker arm ratios on both sides,( max lift just over 675) RR did flow the heads before we started and then after. ( very cool to see the gains,.. bummer how poor the "ported" heads really flowed even with the flow sheet from that shop.. must have been the wrong sheets never did find out

) But even still super cool to see how much air you really need to make those kinds of numbers.

The heads where monsters for power once R&R did the alterations.
Welding of the Zippers 54 MM more port work there, trans work. back cut gears, coatings , and I never did see where it was stated the head pipe was a 1 3/4 head pipe. It was stated to be a white brothers E pipe but nothing more, just like it was never stated how much weight Hobans removed from the crank, after counter balancers where removed as well , Or the amount of crazy compression that was used took 4 comp releases to get the engine started..
How light the rear wheel was, Back when you could still get 93 or even 94 octane fuel without additives. I did drive it on the street , it was not the most friendly set up and did not like light throttle stop and go traffic. But snap it open and it would get you where you needed to go in a hurry.
I would have to say that bike had a lot of work into it to get the last few numbers out of it.. But I think most would agree that is was "purpose built engine" , I agree Scott there are some really big number bikes out there.
Oh here is one that you built man that is making some truly unbelievable numbers

, Cheers
Hope you don't mind I posted it , it is after all a softail and mine was also a softail you stated many times that you have issue posting dyno sheets and that sheets deserves to be shown. STD though .. maybe you have a SAE sheet?? not that it matters and even a cruise drive trans .. !!!