12.7 Detroit adding jakes

Model #770 came on 1999 MKs, as you can see on the uploaded file. I believe model 790 will work as well because the injector, intake, & valve adjustments are the same for both engines. I'd go by the camshaft # to be sure. 790s are stronger than 770s because the lash is larger. Are you looking for engine brakes? I have both 2 piece and 3 piece Detroit engine brakes just sitting in my shop that I've kept around after parting unusable blocks. I would have to check model #s. I'll sell them dirt cheap.

 

I’m interested in possibly getting some of these used Jakes. I’m too new to send a PM. I have a Series 60 powered bus. Thx

 

765 770 are pretty common ether will work plus many more need a new injector harness and brake turned on in ecm plus switches if said truck is not equipped with