That is a big no-no. Only in person with ID. They are going to get their @sses bit one of these days.

 

i changed pcm in 1999 chrysler 300m with a 2000 300m pcm, disc. batt. swapped pcm recon.batt.started great no relays(fuel p.,auto shtdn) did not fight each other as before with original pcm.well you know whats next,after 3 or 4 starts good old skim kicks in.so do i need to reset skim or need a closer match to origional pcm? did i mess up on install or wrong (2000 pcm)?