How reliable is this head? I reailze they are up to 22 whats the differance in the casting ?

Between 17 and 22 the differences seem to be limited to the oil passage between #1 cylinder and the timing chain. DaveM/gsxr has some pictures of the differences.

If you can confirm that an 18 head was original equipment on a turbo engine, use it.

Sixto
87 300D

Isn't the #18 from the NA 603. I think that's what Dave has said.

__________________
1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss

Use it on a 3.0 ? what else?

The #16 is the NA head. The #18 should work on the 3.0 and 3.5

__________________
1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss