I made a post a few weeks ago about erratic miss at ldle. Well after adjusting the valves and remembering back I had this problem on a old eng. These are DDP 50hp injectors with about 5k on them and they run good but I believe there is something wrong in the injectors. I was looking through DAP site and my head was swimming, could not find what I am looking for. What I would like is 60hp injectors, bosh bodys , very little smoke. I mostly pull heavy tractors and don't want to break anything so just staying with injector hp. I had a set of 75hp years ago but to much smoke for me, I don't remember any erratic idle with those.  

Call DAP, I got a 60hp set from them many years ago. They were supposed to be 50s but ended up flowing like 60s, that's what they told me.