The Leyland Australia `black book' one (1976) has a section on 4 synchro remote change, but it doesn't even mention rodchange.
It's pretty useless in a lot of places really,

I bought it because it has the full info on repairing automatic boxes.
This book is still available from
www.pitstop.net and elsewhere.
The Gregorys/Scientific Publications No. 02 has good instruction and info on both the 4 synchro remote box, and the rodchange one.
For the earlier (3 synchro) boxes, see Gregorys/Scientific Publications No. 64.
Both these are probably out of print but I bet you can find them on eBay.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
