It sounds like you want to do it up because of the monitary value, if that's the case I'd say you're at the wrong starting point.
A reshell isn't going to be worth the same money as all original, just like if it's had a motor swap at some point the value drops.

If you want to do it up because having a shiney sandman to drive is awesome, then you're completely on the right track. All those people I drive past who wave and give me the thumbs up never check if my spotwelds are correct for the year shown on the tags, hell, I bet they don't even notice I'm running hj gts wheelnuts on a hz!