Engine mounting 1932 RN saloon

[Hedd_Jones]

I bolt mine down with 4 bolts as Austin intended.....

So, just the four bolts under the feet that also take the no plate brackets?
What are the two holes in the front of the shell & two 1/4BSF holes tapped in the vertical face of the mounting (that don't quite match up!) for???
D

There are 4 holes in the crankcase for mounting. The front two lign up with holes tapped  vertically into the U shaped casting that forms the front of the chassis, with clearance holes in the rail itself. The back two line up with two clearance holes in the chassis rails.

Quite often there is another set of 4 holes, if someone had fitted a 4 speed box to the original crankcase and had to move the engine forward, or indeed if they've fitted a later engine but kept the original 3 speed box and propshaft. Some of the chassis Ive had resemble swiss cheese in this area, chassis usually off 'specials'

Without seeing where your surplus holes are it is very difficult to suggest what they may be for.