Stock 1972 340 intake and Thermoquad HP limits..?

you can take advantage of a short .904 cam
long rod engine thinks the combustion chamber is smaller
long rod engine can't have as much compression as a short rod engine as the dwell around tdc is longer
long rod engine can use less overlap and a shorter cam than a short rod engine
long rod engine is much more sensitive to eo and ic than a short rod engine
(you can get away with a longer cam with a short rod engine)
your intake center line will be later with a long rod engine
etc
and you have to have a longer cam with a .842 lifter
but as comp cam says more area helps hp without killing torque
so pick your rpm range which gives duration and your intake close which gives dynamic compression or if you have fixed compression do it the other way around
and have some hp without loosing much on the low end