got a excellent auto here out of a 6, if i swap the bellhousing will it fit onto my windosr?

No, The output shaft & rear extension housing on the V8 BTR is longer than the 6cyl + the planetary geartrain inside the V8 is a lot bigger to handle the extra grunt & The V8 torque convertor has different mounting pads where it bolts to the driveplate compared to the 6cyl.

ah ok cheers

I know the internals are a little weaker in the 6cyl box, but if all the shafts are different theres no point