Mopar purple .528 for a 383?

Thanks man, that sounds perfect. It’s .030 over bore but that should change the number too much. I could always go with a thicker head gasket to knock it down some if needed.
.030 of bore usually gets an additional point in compression or close so I'd run a .039 gasket.
Hopefully since the block has been machined it has been decked and is .000 deck and decent pistons were used. .039 gasket would put you at 10.2 if it were me I'd shoot for the higher but California probably has **** gas on purpose