Basically the speedo drive in my gearbox has died, can;t get the pin out at all tried WD40 heating all the usual and now its gone and snapped on me, last options a gearboix change as i;ve tried driling the pin and its just too solid to do owt just chews up all the drill buits i throw at it.
Basically will a 1.6CVH BC gearbox bolt onto a 1.3HCS ok or will i have to swap clutch and flywheel?

Thanks