340 main caps

MOPAROFFICIAL said
How the registers are cut in relation to the cap is the problem there little different in each block, you end up with the cap sitting off set to the main bore. So Machining the register one way or the other to scoot the cap over and then if possible Re swedging/staking them to snap in...then a line hone hopefully is enough...
Anytime though you have to 'line bore' you're definitely going to end up with a chain that's jus a little loose..sometimes even a .010 under chain is loose.

toolmanmike said
I would imagine they fit the caps to the block and then machine the bores. We should ask @krazykuda. He worked at a Mopar engine plant.

On our engine the main bearing caps came in a bundle all in one casting... We had a machine line separate from the block line near the block line that machined the caps and the channel for the register, rough bored the caps, then sawed them apart...

Then the caps were installed in the block before the main bearing bores were align bored with the caps on the block so the bores were all in proper alignment with each other...