Main Studs??

Mopar Big Block

Since this Block has extensive 'webbing', these Block Castings are extremely sturdy.

The Main Bearing bores have additional 'Lower and Mid' strength, and the sidewall
supports help prevent distortion.

It is a 'very rigid' Block {225 lbs. bare block}.

1/2" x 13 Main Bolts

We have never found any 'significant change' in the Main Bearing Size when using
Stock OEM Main Bolts, when using the 85 Foot/Pound Torque Specifications.

And, in applications where we used the slightly longer 426 Hemi Bolts @ 100 Foot/Pounds
of Torque, again there was no significant change.