Hello all,
Thanks for the info.
Yes, the earlier one doesn't have a muffler port in the deck so it would be a 68-70 model. The 'later' one has the exhaust port in the deck. Both of them have the G3 carby's.
I think I've got one of the orange ones here too so I'll have to dig it out now while i'm on a roll.
Cheers, Ted