BOOSTED BBC!!-454 Borg S480 Upgrade

We replaced the low-buck, EBay GT-45 turbo with a larger Borg S480. The S480 offered a billet wheel, a drop in back pressure and more power potential. This is part 3 of the Turbo Titans series, where we compared the turbo 4.8L LS to the turbo 454 BBC (both with the smaller Ebay GT-45 turbo). In part two, the 4.8L got the turbo upgrade, now (in part 3) its turbo upgrade time for the BBC!