Originally Posted by
tiff_lee
Ah ha thanks for the info, I wasn't trying to be obtuse just wanted an understanding of the difference.
I take it by BC gearboxes you refer to the type used on cvh engines? is there an alternative?
Thats ok mate everyone on her likes to take things the wong way lol

Yes BC boxes are what is fitted to mk3/4 escorts, there a a few alternatives all that require some modding of the chasis I believe, MTX75 etc.. not looked into it myself.
Or if you have deep pockets you can buy a stage 2+ BC box from CTS that should last forever.
http://www.gearboxman.co.uk/psgearboxes.html