Hey also I did a quick research for you on google for that machine, this is what I found out:
-Most Gorton mills came with B&S #10 Taper, the drawbar pulls the collets up (which are proprietary to the machine with the equipped collet adapter.
-You can actually make an R8 adapter sleeve to use R8 collets if you wanted to, using the same drawbar... but the Gorton collets are probably pretty decent enough already.
-Gorton mills are regarded as being top quality, and reliably built.
-facemilling and boring heads may be quite a challenge for you to mount and use adequately without modifications... sort of disconcerting unless you have a lathe and know how to use it.
-It's an excellent investment for a fair price, especially if you value classic, irreplaceable domestic machine tools