I want to change the vacuum relay in my Ten Tec Titan 425. It has a Kilovac K41 in there now and Ten Tec still uses that one when repairing the Titan. I'd like to use a Kilovac HC1 (or Jennings RJ1). Is this preferable? What do I need to know before changing to this relay, any suggestions/hints/advice? Tks much, Gerry