Definately the wrong engine as Joe states...

The 320 was SBs utilty Versions

This doesnt appear to be a Ute....Its almost certainly 60s as it still retains its metal catcher.

Id say this was the first 320 by SB and still classess as a utility due to its steel base. The other thing to note is its axle mounts, as they are of the same external weld on style that is on the later 70's 320 series Utilities which were green base red engine.

I cant find an Image of an original. If nothing comes to light Ill find the model in my list when Im back at home in a few weeks and at least mate it with the correct engine/engines ,which was probably a white B/S.

The gold base green engine 201/ white kirby /white briggs were on the SB35

And the Blue base and Gold engine was On the SB 47

Then the Green base red engine on the 49 320 520 and 720


And welcome back also Joe...:)