A freind of mine recently who works for the city recently parted out a '91 Crown Vic police car. He only paid $100 for the whole car and he sold enough parts to get his money back, so he offered me the motor out of it for free. While I don't have any current need for it, I hate to see it thrown away, so I told him I'd take it. Here's my question: it's a 351W, but how similar is it to older 351w's? Are the blocks the same? Same heads? Is it a roller cam motor? Thanks.