408 W2 head combo - suggested upgrades

Mild port work to start... W2 heads have lots of room for improving,there...
Rear gear, rear tire height, transmissions(converter stall,stick?.....), what you are willing to go to,& how fat to get it... On, what you currently have.....: port the heads,get a good quick action flat tappet solid ,to match the current combination. Unless ,you want to re -engineer the whole drive train...JMHO....