Fail that it took him 15000$ to make that much power. I imagine most of that is in labor, which shouldn't count. So realistically he's only got maybe 6000 and he still coulda spent that money wayyyyyy better.
Also on the gmc. 4wd isn't going to help, like at all. Providing he uses it, he can't switch back to 2wd when he gets traction and that 4wd will cause excessive drag on the powertrain. It won't assist whatsoever.
The eclipse will win by more than 1 second. If it doesn't make him sell the car for 200$ to me and I'll treat it right.