Head and cam selection help for 440

Blended is just that...... the areas where the machining ends and the casting starts gets “blended” together at the transition points where they meet.
It’s the port openings and bowls.
On Ede BB mopar heads more time is spent on the port openings than the bowls, since that’s where the transitions are the worst.
The “prep” part is: disassembly, sizing the guides, recutting the seats, back cutting the valves, cleaning everything, and reassembly.

Again, if you think they need to be better than that, TF’s will end up costing less.

As far as I’m concerned, the TF240 is the “reference standard” for std port heads.
In ootb form, it offers the best overall balance of flow, fit and finish, and cost.