It’s important to note that when replacing the Hillman engine with a Series V Alpine engine, the motor mounts, while in the same place, are NOT the same size.
That’s a bit of a difference!
Another point – after finally getting the right motor mounts from Speedy Spares (once they opened after shutting down for Covid 19) we put them on the Alpine 1725 and went to drop it in place, but it didn’t fit! The Alpine front engine plate looks the same as the one on the Hillman engine, but it is a couple of inches narrower, so the engine came out, engine plates were swapped and then it all fit.