Never could get the external voltage regulator to work on our Gen 3 Hemi swap, so did the next best thing by having the alternator converted to an internally voltage regulated one wire setup! Switching over to a 2005-2008 Dodge Ram truck starter as well for the 73 Challenger build as it is more compact that the old school Mopar Mini-starters.
Canon RF 28-70, RF 100 & R5
NEFFEX