mild 440 build

My brother recently bought a 73 charger that came with a 75 440 with 452 heads. He's wanting to rebuild it with a few performance upgrades. He want to keep it streetable and running on pump gas.
He's thinking new pistons and some head work to get the compression up around 9-1. He's stuck on what bump stick to put in it. Was hoping some of you might have some suggestions on cam and valve springs.

He is also thinking about roller rockers.

Like I said he is not wanting to create a monster but would love to pull a few more ponies out of it and be able to fry a tire of two once in a while. :D