Spark Plugs for Slant Six?

The Chrysler spec for electronic AND points ignition is .035.
I think I remember SSD saying you can go to .040 or .045 with HEI because of the hotter spark.
Why do you want to go smaller at .030?

Thank you KK.

Dont get me wrong, im not trying to fly in the face of great advice, but I have a lot of unknowns with this car yet and do not want to change too many things at once and chase muh tail. Easy enough to change em to .035 once she's back on the ground and running.