d8a

[darrenjlobb]

There not the same....but yes they will all fit.

Hmm. Porting? Or cams?

There's some interesting cam speculation going on at the minute...

Nah identical in that respect, the later DHY ones just have steel inserts between the valves to help prevent the common cracking issue (makes a big difference) there are also some other subtle differences like bolt holes on the side, and webbing around injectors, but not stuff that makes any difference to anything.