Mechanically it should be straightforward. Electrically ... the lights are simple. If you want to use the fan speed controller located in the hood there's some possibility it might not work with the external blower. Generally when you get an external blower (which one are you thinking of?) it comes with its own variable-speed controller and the easiest thing is to install that in the wall. I have a wall switchplate housing both the fan controller and the switch for the hood lights.

Thanks colin3. I was assuming that none of the fan controls on the hood would work, but hoping to get the light controls to work. For external fan, was looking at Fantech RE 10xlt - 1008 CFM for $548; and for the hood was considering several models from Signature Hardware, either the Casselle or the Treviso (both from the ProAire line). Wonder if anyone has experience with either of these, remembering that I am going to "gut" them WRT the internal fan - just take the fan out.

Just make sure the type of fan control you choose is compatible with the remote blower. Many blowers are meant to be used with 3 speed controls, vs variable speed, using the latter may damage the motor.

Thanks colin3. I was assuming that none of the fan controls on the hood would work, but hoping to get the light controls to work. For external fan, was looking at Fantech RE 10xlt - 1008 CFM for $548; and for the hood was considering several models from Signature Hardware, either the Casselle or the Treviso (both from the ProAire line). Wonder if anyone has experience with either of these, remembering that I am going to "gut" them WRT the internal fan - just take the fan out.