Anyone using a P4452782AE on 340/360?

That's not too big... If anything install a set of Rhoades variable duration lifters...

Run it with a good dual plane intake and I like the Holley 80457 carb - 600 vacuum secondary...

Holley 4160 Aluminum Street Carburetor
Yeah, the one part I forgot to mention. I have headers and a carter 625. I have a new set of mp lifters and upgraded lunati springs.

Jake