Well great. The only thing on the car that I have not put on and removed at least twice will now join the list! Thanks for the advice though, better now than after the engine is in!
By the way, it actually fit pretty snug both on the bolts and into the frame, that is why I did not question it initially. It went in quite hard and is mounted very securely in the brackets. The main change I can see is firmer support with the harder bushings.