Hi All, A friend of mine had a set of heads he was going to use on a V8 TR6 project that he had to sell unfinished. I got the heads . All I know (through him) is that apparently they're cast alum Ford Motorsports GT-40 heads that came off a HP 302 Slalom car back in the 80's. I'm going to use them on my 289 build with the objective being a 300-325HP 289 I can't find GT-40 anywhere on the heads though but can see Ford Motorsports in the casting. There is also a serial number of some type as well. Two questions: Anyone know how to identify exactly what I've got here (i.e. what should I look for on the heads)? Can the roller rockers be reused? I know the lifters shouldn't be reused but what about the rockers? Thanks.