Quote Originally Posted by HK1837 View Post
If it is a manual block then you need another Dellow bellhousing
There is some adapter plate on my 308 to make the TH350 that was in it fit. The HQ was originally 4 speed so I'm guessing mine is an Aussie pattern 308 which should just match the M21 I'm putting in. I haven't pulled the auto box off yet but you can have the plate if you need it when I do.

Mauser