Budd,
What may seem like a great idea at the time may turn into more trouble than it is worth. Pads require proper indexing to properly align with the barrel - this requires the painstaking care of a qualified smith and then the mount must also be correctly set up before you even get the scope on there.
Additionally using the pads would also require drilling into the receiver rendering the rifle now historically worthless. You will have an ersatz No4 sniper that will no longer have any collectors value, due to the drilling the receiver. For all the effort and how little you stand to gain, I would strongly recommend you go with a no drill mount ... but that's just me.
have a look at the link I posted above that discusses repro Enfield snipers using no drill mounts and see how good they can be - it is win, win ... if you drill it you can only lose out in the long run should you ever wish to sell it on.
Tiki.