Austin Mini NOS Plug 12A604 Deva Bush Conversion. Plug Primary gear oil way. For oil fed bush type crankshaft when converted to Deva bush. Note many oil-fed bush type crankshafts have been converted to the later Deva bush operation (using a different primary gear) If you have 997cc the crank 12A298 needs to be measured to determine if 1 3/8 D.U bush or 1 1/2″for Deva bushing.