Yes it is fine, the only thing to watch with the 3 doors is the headbolts themselves, as they used a much smaller washer under the bolt head, the later 2wd sapphy ones are physically too large to go in the holes machined in your head, some early 2wd sapphy also had earlier head type holes.
Personally I'd buy the Cometic gaskets for everything, apart from the YB0611 head gasket, I'd get these from Matt Lewis 01543 484488 07910818110.
tabetha