Roadster I know about the high nickel in the metal the old caddy's had thats why they wore so good or lasted so long. I was just mentioning the pistons because there were several piston changes over the years. Of couse the after markets are better and you could make lots more HP. There are lots of thing you could do to a new motor like that differant cams fuel injection after market heads intakes and all. The question is how much does he want to spend $$$$.
Kurt