Aluminum heads are generally considered disposable on cast iron blocks... You'd probably have better success with a replacement. See Message #31008, then contact Martin Gutkowski direct. He's become rather expert of late retrofitting Volvo components on PRV. B28F is standard in early 80's 260 series, and mid 80's 760 series. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, Travis Goodwin <tgoodwin@xxxx> wrote: > Has anyone attempted this? How did it turn out?