Bernie,
This box is based on the 4cyl capri/escort/cortina. Not strong or robust enough for the torque of the V6. Fitting wise: Major work to bellhousing, gearbox mount forward by 50mm, longer tailshaft. No gain for the pain!
What is the issue with the original V6 4 speed.
Can supply and rebuild these, supply MK2 4 speeds and Tremic T5 5 speed conversions.
Regards
John