The 87-91 Lincoln Mk VII's had 5.0 HO motors with forged pistons, roller cam, aluminum valve covers, and E7 heads. Good motor to get at junk yards, there are 3 at my junkyard. We pulled the intake on 2 and saw too much gunk and decided not to get them...went back the next day to look again and they were gone. They are good motors, 225 stock HP and you can port the heads for another 20-30 HP. Forged pistons are good for nitrous too . There are lots of 5.0 roller block motors in late 80's and early 90's cars (like t-birds), but they don't have the roller cam or forged pistons.