On a recommendation from another member here (4D55 Performance), I found a replacement head for my D50 through Heads_r_us on evilbay ( ), but it mentions checking the injector thread size for dodge d50's. Haven't bought the head yet though.

What size are the injectors on the 4D55 Head anyway? Don't know what year, The engine came from an '85, but the parts were all mixed & matched on the engine when i got it.

So how do i go about confirming my injectors will fit before i send them off to be rebuilt/before i buy the new head?