1600 and 2000 engines have valve/piston clearance problems, but the 1800 and 2300 do not.
I worked at a Vauxhall/Bedford dealership in the 1970's when these were introduced, and they weren't that bad, especially compared to the old CA vans.
The gearbox on the 35cwt vans had modified bearings with nylon cages to keep noise down, I think Ford were using the taper seat plugs as well, the Delco distributor was a bit of a problem, especially as nothing else used it apart from the Victor car.
They made a few of them, but most went out in primer to customers or bodybuilders so were unprotected until painted.
The long rocker cover oil filter was an early casualty, that was shortened and a stiffener brazed in between the filler pipe and rocker cover.
Perkins engines were used to provide a diesel, but they were underpowered.