Howdy
i have 2 mini engines, a 998cc (99H791PZ522581) and a 1275cc unit
(12H706AA33121) from a GT.  I want to recon the 1275 gearbox for the
engine rebuild and am about to strip and rebuild.  My question is
this, can I interchange parts from either gearbox if necessary for the
rebuild or are they incompatible.  This applies to things like the
housing etc, bearings and wearing parts will be renewed  I realise
that the 1275 unit will have a close ratio box and the 998 won't.

Also on a secondary note can anyone identify the age of either of the
engines from the numbers, are they both A series engines.

Will I have to use a gasket between the gearbox and the engine?

Thanks
Leon