I plan on switching to a 165 ecm, my question is what memcal will i need? ill be using a g3 adapter for tuning if i go this route, but will need a memcal for the knock sensor and limp mode, correct? Are the memcals hard to find like 7730 memcals or are there quite a few out there? What should i look for its a 5.7..partnumbers, years, etc? Thanks