LT77 conversion - any auto prop or 3500 only?

[Quagmire]

Hi guys, had a search but couldn't find the answer so am asking here...

As per the topic title really, I have an lT77 to go into my 3500s, there are many posts stating that you need an auto prop but nothing that says if it has to be from a 3500 specifically or whether it can come from a 2 litre model.

Any info greatly appreciated, thanks

 

[harveyp6]

IIRC it's 3500 only.

 

[Quagmire]

Thanks Harvey - I shall look for one!

 

[arthuy]

I may have one.

Need to measure it though.