Ok so some simple online research reveals that the Dagenham 4 speed is not a very good box to have!
I am now leaning quite strongly towards a 5 speed conversion.
So I spoke to Mark at Eurospeed and he is going to confirm what stock he has before I give him a deposit to start reconditioning a Sierra type 9 5 speed for me. He said the conversion is quite straight-forward and I am quite excited that maybe I have a pathway now.
Only major hurdles remaining would be:
- Need a bellhousing to suit
- Tailshaft may need to be modified for a new yolk / uni