I am in process of replacing #14 head with #22 head on 1987 300TD. #22 head came w/o prechambers but I have set of brand new prechambers 601-010-28-62. Problem is that that compering to old prechambers on #14 head capacity of new prechamber is significantly less than old due to smaller inner diameter. Also inner thread for injector mounting hole is different and if i decide to use new prechambers I think I have to switch to newer style injectors NA35X where old injector is NA36X. My question is or set up with new prechambers and new injectors will work or injection pump must be recalibrated to accommodate new injectors. From what I was able to find out that Mercedes used 601-010-26-52 prechambers on 3L turbocharged cars from 1988-1993, mostly in Europe. Another problem may be lines from pump to injectors. Can not use prechambers from old #14 head, diameter of neck is 14 mm where #22 needs 15mm and 601-010-26-52 is exactly that. Any experiences, any thoughts on this?