On 2/2/2021, Mike Ellsmore in Nunawading, Victoria, Australia wrote:
"Thought you might be interested in this side mount engine stand, the best I have seen, gives clearer access compared to other versions. I took this photo at A J B Engineering in the UK back in 2015".   https://ajbengineering.com

You can scratch your head over this one for a while. The engine block is 1968 or later MGB 5-main bearing engine (two sets of holes for rear brackets for generator or alternator). Cylinder head is 1967 or earlier MGB (or later European with no air injection holes). Rear plate is 1955-1958 MGA (low starter position). Or, since this is a European build, it might be for some other model car. The ARP 12-point nuts on high strength head bolts are nice. I find it a bit strange to see four tall studs for the rocker cover, when usually only two will fit. That might be an error needing correction.

This particular engine bracket will only work on the 1968 or later engine blocks with redundant holes for generator/alternator rear brackets.