Bit of an update after lots of measuring and fiddling I will now not be using the MA cranks as it would be just another thing to potentially go wrong so i will now be just using the CG10 cranks and .5mm oversize Corsa pistons, whch will give me 1087cc, a bit down on cc's but should be reliable, and high revving too, and still leaves plenty of Liner thickness on 1275 auto block, I will get some pictures up as soon as i can find the phone lead!
