24 Spline Hub , filled in the last in-service detail for the RM / Army version (soft-top) - the later front windscreen blind.
If you search this Forum on 'winterized' you will find how all known variations 12 volt and FFR (in the main the actual variations - probably 'slave-start' variations). There are a few ex- FFR's around , they would never need a slave-start battery
the survivors - show the rear starting battery boxes ( I remember giving a few of these the eyeball). I have some full kits (conversion) + heat exchangers (inc. a 24 volt fan one) that were not part of the full kit
Kits now more or less unobtanium new. Sometime - I intend converting a 12 volt but with early type duck blinds. I have a spare FFR but would not cut the tub for the batteries , however I have a slightly damaged tub that I may donate.
There is just a little unknown about the RAF hardtop 'winterized' , IIRC some of these had the heat exchanger in the tub. probably the only area now in need of research is the HT 'Helistart' . The problem being that there are hardly any "In-Service" photographs of all three services - and I doubt if any fresh ones will ever be turned out
IMHO - all is known about the body / floor insulation , from ones viewed at disposals - there seemed to be a few minor variations.
Most certainly at 1993 - I can say that 'genuine conversions' produced by C.J. Williams Ltd , the VRM's are / were all known (the MD told me so) . Protec Precision (the successors to C.J. Williams) of Aldershot possibly still keep these records. Possibly I should have asked the MD for a copy at the time , the other thingie I recall - he was very pleased to have a few L'wt parked on his lawn awaiting conversion. Vehicles (Lightweights) - converted using the "kits" by REME , well after conversion the trucks were re-allocated a different NSN - so that would make for a good FOI request , then subtract the total of L'wt converted by C.J. Williams = No. of REME / ABRO conversions
(presently a statistic : unknown).