Main Studs??

Like anything,

It depends on the application.

In General, a Mopar Big Block {361, 383, 413, 426-Wedge and 440} have pretty
'square' Mains.

Before the 'ARP-Bolts', we used Hemi 'Main Bolts and Washers' for the Main Caps
and never experienced a problem.

I would say we machined the Mains on approximately 10% of the Mopar Big Blocks.

And we had both the Sunnen CH-100 Align Hone, and the Tobin-Arp Line Boring Machine.