I had a P37 with a V hull & 180 HP mermaids, built like a tank but short on power for planing. It would plane as long as water was quite calm. top speed 16 - 17 kn. I considered having engines rebuilt by mermaid and they can get them to 220Hp which is quite a boost. sea keeping not as good as newer stuff. I had mine out in a F6 and they do slam a bit. For the money though good boat @ £45 - £50 K depending