Hard to tell which kit it is from those pics, but just judging by the engine hatch and the exhaust outlet I would venture to guess that it is a Jet Hanger. It could still be an early Yellow AC kit though.
Pull the hatches and get some pics of the ducting.

Re: the fan and starter probe.
6mm is very close to 1/4". If that is indeed a Dynamax fan unit it should be a 1/4" hex. Make sure you use the correct size because they will round out very quickly if you don't. Always use a little lube on the starter probe as well to keep this from happening.