The injector lines connect to some sort of union that passes thru the head then the fuel lines to the injectors connect to them . Sis shows orings on them unions . Friends truck has some that are moving in the head is the o rings the only thing that holds hem in place , sorry i dont have serial number or ar the tags are all gone . Waiting to see if peterbilt can get me the original engine info its a 1989 pete if i remember correctly .
There is a pressed tin retainer that bolts to head. Bob
Should be something like this:
Those fuel line cross overs that pass through the head were up dated in the 90's to a solid piece with a o-ring. The formed metal retainers were always a problem. Truck Shop
Thanks guys i will look at it closer next time i see the truck hopefully next weekend.
Attached is some information on the adapters: