Thanks guys.
Chris'I , I think you might be be talking about a fellow 240 owner - Steve Francis. He has a red car like mine but with a black bonnet. The biggest difference however is that he has a 5ltr Ford V8 in his car, mine is a 2.8 ltr Datsun straight 6 engine. Steve and I are similar speed but he just has the edge at Castle Combe, his local circuit.
We were both at the Silverstone Nissan Parade day, if any of you can remember. On track my modified 240 couldn't stay with the quicker 350s on the straights but was quicker over the full lap. It's all down to weight, a 240 is near enough just 1030kg so braking and cornering speeds are better. The 350 is a great road car in standard tune.
MartinMac, sorry I forgot to mention that you introduced me to this Forum.
Pictures - they are too big to upload, I may need help with that. Yes I have a couple of short exhaust clips too.