I am considering the PI head swap for my daily driver: 97 GT, 217k miles. She already has a PI intake, PI cams and some other basic bolt ons (OR H-pipe, underdrive pulleys, upper plenum / 75mm TB, drop in K&N, tuner). Only current issue on the top end is some slightly old valve seals that occasionally leave a puff of blue smoke at a long stop light. Timing chain guides were replaced at 175k, so I don't worry about the timing set too much. In the garage, I have a low mileage Romeo PI engine with a smoking problem. From testing, I think it's a blown head gasket, or maybe a ring pack issue. I will be tearing down the engine to part it out anyway, so I will have the heads literally in hand. So is it worth the effort? The gains would only be 5-10hp, even with my other mods? The time required is around 12-16 hours to do it yourself? I guess the only cost would be the FMS head change kit at around $120. Seems like too much work, so I am thinking it makes more sense to sell the heads, and use the time and money for the roadster instead, so I'll be curious your replies.