just a quick one api, you put uk diffs are 3,545. but before i changed my uk95 early classic to a ty754. most if not all the rear diffs came up as 4.11 & the australian ones were the 3,545
i dug up what i throught was every thing to find out any issues refgards changing things over.
the only differnce to changing from a ty752 & the 54 is you need to thread the casing on the lower bolt to fit the starter on.
and the casing is a little tight when fitting if you have a td05
apart from that. is there anything else needed?
this link is some thing very simmerler to what i looked at.
but very helpful:
http://spda-online.ca/modules/tinyco...ite/tc_28.html