I would have liked to own an FN Deluxe in 30-06:
Unfortunately, the one I have is in 270 Win
A previous owner installed the rubber buttpad, and that is just fine, it does reduce the recoil. The FN Deluxe was an expensive rifle in the 1950's. Without a Lyman 48WJS on the receiver, the suggested retail price for a M70 was $109.50, with the sight, $123.25 in 1951.
In today's money, a $109.50 rifle then, would cost you, $1.073, a $123.25 M70 with irons, $1,208, and the FN Deluxe, without sights, $1,348. You paid about $300 more for an equivalent FN than a Win M70.
If you don't like the stock, don't whittle on it, or toss it out. Original FN Mauser Deluxe stocks are expensive. Mine has a chrome lined barrel so don't use a gunpowder solvent that is a copper solvent. Might attack the copper under the chrome and cause the chrome to peel. Or at least that is what I have heard, and I don't want to find out.
If you don't like your scope and mounts, you can look on fleabay and find Weaver mounts that will fit the FN commercial rifles. Mine came with Redfield Mounts, but you know, I prefer Weaver type now, because I can take the scope off, and put it back on, without a major re zeroing effort.