Engine mounts

[timbigden@icloud.com]

The engine on my 33 PD was solid mounted, bolted to chassis. As crankcase was damaged I rebuilt with a more modern rubber mounted crankcase. I’ve just put engine back in the car but the two front mountings in chassis seem to a different thread to the new studs and rubbers I bought. Also the large rubber bottom ring rests on hex section of the stud this dosnt seem right?
Any words of wisdom appreciated - TIA