Why would you want to use a girdle on a BB Mopar V8, they do nothing to strengthen the blocks
Look at the main webbing in those blocks, B and RB as well as 426 Hemi, the 426 hemi block is the only block that benefits with the side main cap bolts due to the extra iron cast in their main webbing from the factory.
I will say this, I've built a bunch of 600+ HP pump gas street and strip 440 with stock caps and aftermarket bolts as well as new main studs, neither one will add strength to the main webbing.
Your best bet for changing parts on the 440 blocks to help them live is to add a set of good quality aluminum main caps and studs, forget the girdles
BTW, the stock 400 blocks are way thicker in the main webbing than any of the production 440 blocks, car, motor homes, trucks and marine blocks.
Make sure and have then sonic tested by a good shop before starting as the cylinder walls can be thin
If you want to make a lot of power, above 750+, start with a good after market block