Anything over 100 projected twin cam horsepower (cubic inches is of no concerns), should have the necessary measures done to the sub-par Harley bottom ends. Most will say this is not necessary but I can say I am not a lucky one and after installing cams / heads for only 4000 miles and a lower end failure I can just give you my fears.
Keep your bike stock and buy a $5000 Jap bike that'll last forever as a second go to speedster.

The whole crank thing is a crap shoot. Some stockers have problems and many 120+hp ones don't? It is how ya ride and assembly tolerance/precision. I been running a 112hp 103 on stock crank for a few years, fingers crossed. Are ya feeling lucky??

I feel like if you're going to mess with the 4.375 crank, you should go 117 and have your cases bored. Nothing wrong with having crank addressed for a 107 or 110, but it's minimal cost to go 117.

I did a true, balance and weld on my 107 all bore and I'm glad I did for piece of mind, but I should have gone 117 or 124.

Not to get even more side tracked.....

For piece of mind, I went DarkHorse for the works and added a SE Timken Bearing last winter when I did my SE 117" Pro Race Big Bore Motor upgrade.

To ME, it just made sense. Glad I did!


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YB

Highly appreciate the input guys- I'll have to add potential Darkhorse service to the list of upgrades.