Well, you'll need to trade for it in order to evolve it, but if you are willing to trade for it when it level 40, then yes, its stats will be higher.
In the end, it makes no difference, stat increases are retroactive. Boldore learns moves faster if you evolve it later, but Gigalith will still learn the same moves later on.
Level 40.It will evolve at level 40.
They evolve on level 40
It evolves in Pokemon Diamond and Pokemon Pearl at Level 40.
A fire stone might work, but ponyta's usually evolve at level 40.
It evolve at level 40.
It evolves at level 40.
A Lileep will evolve on level 40. So will Anorith.
it evolve at level 40
Loudred will evolve at level 40 or any level beyond 40 (if it's already 40).
wailmer evolves at level 40. im positive.at least in emerald it does.
Omanyte can evolve into Omastar, starting at level 40.