Three winners will each receive a trip for two to the Goodguys Southwest Nationals car show at the West World of Scottsdale Special Events Facility, a prize worth about $1,500. And one of those three winners will be selected at the show to receive the grand prize, a GM Performance Parts all-aluminum 376 cubic inch LS3 crate engine, a prize worth over $7,500.
120 additional prizes will also be awarded, including subscriptions to Muscle Car Magazine and Beckett Media goodie bags.
Entry into Muscle Car Power's LS3 Engine Giveaway Sweepstakes is open to residents of the contiguous US aged 18 and above. Enter daily through October 11, 2010.