As the title suggests I'm getting ready to put in the new Solex 44mm I bought some months ago To do this I needed to get rid of my 05 disributor which had a pertronix ignition system in it amd was working perfectly and go to a mechanical advance. So I bought this: At first I thought it wouldn't fit so I ended up getting an 09 just in case as the main plan is to keep Marley going as I make the changes gradually. The distributor which is fat will fit in a type IV engine! Providing you remove the oil pressure switch and oil pressure gauge. VDO make a remote adaptor (Rubber hose with the correct fitting). This allows you to house the oil pressure sender somewhere more convenient....... I then had to take out the old air filter while I fitted everything back in (no not the Carbs.....Only had an afternoon) The Flame thrower 2 billet distributor has advance curves you can set ' Initially I had 12 degrees idle and quick responce to 28 degrees........not as good as the 05 I don't think...... so tomorrow I am going 8-10 degrees and limmiter of 20 degrees Jake Raby has a few ideas about this so its not totally haphazard. Will take a few pics tomorrow and let you know what I think,. Currently Marley is running well but just has that tiny bit of a lag that wasn't there with the old distributor.