Hooker BlackHeart has quickly become the leader in LS engine swaps and we are excited to announce new products for 96-04 Ford Mustangs with GM LS engines. The new Hooker Blackheart LS swap engine adapter plates are designed to be used with Hooker Blackheart 71222012HKR or 71222013HKR transmission crossmembers for 1996-1998 cars, or 71222013HKR or BHS507 for 1999-2004 cars