[A26B]

I've been thinking a bit.......

Does the head side of the injector housing look like this? A


or this? B



and, does the cylinder head look like this?C



or this? D



A Injector housings can be used with C or D heads,
but
B injector housings can only be used with D heads.

With parts being swapped around, it wouldn't be out of the question for later style injector housings with open crankcase ports (no "washer" type baffles) to end up on 1990 cylinder heads with the large crankcase vent holes. its OK to have small baffle holes in the heads AND in the injector housings, but for both to be unrestricted would put a lot of oil into the injector housings and subsequently the PCV system.