318/410 What do you think (posting for a friend not my engine)

The heads will be the restriction... You need something that breaths.

So many guys build these big inch strokers then plug up the engine with stock head's or Chinesium head's that can't handle the cubic inches.

Use Trick Flows, Edelbrock Victor's or W-2's. Otherwise you just have a rough idleing dump truck engine.

There...finally got that off my chest!