Kelly.
Whether it is AC, Bristol or Ford powered, check the engine number, marries that on the chassis plate, The chassis number is also stamped on the door hinges, bonnet hinge and boot/tailgate.
BEX798 mleft TD with Bristol engine number 100D21092.
Bristol engines when warm should show 60 psi at 3000rpm. when very cold oil pressure will be over 80psi , let engine warm up before driving, as you have best of 2 gallons of oil circulating which will take 4/5 miles to reach working temp.
The diff on the Aceca is rubber mounted, if noisy then it could be wear in diff or possibly drive shafts, if new drive shafts fitted and not correct ones then they wear quicker, any knocking from rear indicates potential wear in splines / UJs and /or diff.
The Aceca has heavey Ali skinned wooden framed doors which should fit with even shut lines as should the tail gate. check for body flex and check ali body work for poor repair and or body cracks.
Brakes should pull up square, on test drive get brakes warm, ideally take wheels off and check drums for broken cooling fins and if possible to investigate insde drum that they are not cracked.
Alfin Drums available but are near £500 each. As BEX798 has discs one has only rear drums which only contribute to about20% of braking.
This Aceca should be light and responsive on the road especially as it has been converted to rack and pinion steering. Rear wheel steering and nervious handling will indicate wear in rear suspension, Also check for even tyre wear for correct alignment.
Sorry I can't be of more help as I drive a Ace which has basically same running gear but bodily it is simple where as the Aceca has multi tubes and plenty of timber which all need careful inspection. Especially at the rear and diff area.
Plus I am self taught and not a fully trained mechanic.....
Hopefully some of the above is helpful.
Looks a v ery nicely presented and faithful Aceca.
If Ace / Aceca is really sound and numbers match.......Buy it and enjoy it, then share it to your kids who should become future custodians, Once you have a AC they tend to stay with you for years and become one of the family
Good Luck...........Keith..[
]