Hi Graham,
The radiator is from just jap. The N1's are a .60 front and .64 rear, dont have the PN's sorry. The car has been running for some time and I have really enjoyed it. Its a bit of a sleeper, when I took it to the drags my mates were recording the runs, on the first run the people on the hill were pissing themselves when I lined up, they stopped pretty quickly after that. Ive got a new Liberty GTB now as a company car and I dont really have the time to dedicate to the 260. Its just gone into the panel shop for a tidy up (front bar etc, the usual problems with a low car). Make sure you have plenty of coin behind you before embarking on a build like this, they are a money sponge.