Main Studs??

I am with Kim here...ALIGN HONE IT !
When switching from Main Cap "Bolts", to Studs, it is highly adviseable to have the Bores checked with a Dial Bore Gauge at the very least....the Default being to Align Hone the mains as best practise.
THINGS HAVE CHANGED !
** Years back the recommended Torque for ARP Studs was 80 ft/lbs with their Moly, and 110 Ft/lbs with Oil...and usually Guys were using "P" eccentricity Main Bearings back in the Day as well, more forgiving clearance-wise as you move away from the parting lines, so no wonder many ran just fine as very forgiving to Main Bore distortions created by the Studs.
Nowadays,
the newer ARP Moly recommends 110 Ft/Lbs, and a lot of guys are using "H" Mains for the higher filet Cranks etc., so the distortion and "forgiving" factors have gone up proportionally IMO.
Personally, I haven't seen too many recently, that when the Studs are substituted, don't have at least one or two Caps that go "tight" past my comfort zone for performance useage, and require at least some Align Hone work, which, I usually just cut all 5 Caps and do it right because I gotta Dyno it before it leaves with my name on it.
That said,
as the saying goes....yep, SH*T will run...you do as you please......but don't think the Bores aren't distorted.