Detroit 60 12.7 Jake brake compatibility

Some MK had the three piece jakes on them 770. Looking at your ESN it appears yours did but you need to verify the rocker arms before going to deep.

 

Why would you go back to 765s from 795s...Im curious cause I have 770s and ive been wanting to upgrade to 795s.

 

From what I've read on multiple forums the 765 has more braking power than the 795. But you can't believe everything/everyone on the internet. My neighbor had a 12.7 with 3 jake heads, lost a rocker arm and in order to keep trucking while waiting on parts he swapped the rocker assembly out of his dad's truck but that assembly was only compatible with the 2 jake heads, he said the 2 jake head assembly left a lot to be desired compared to the 3 jake heads. He couldn't remember numbers but recommended the 3 jake head configuration. From my research on a lot of forums and pages I've come up with the 765. But I've only experienced one and not the other and it doesn't sound like either jake assembly will be as good as cummins