I need to find some seat bolts for my '70. Main problem is that here in Italy is not easy to find (and also identify) inch bolts. - First of all front seat bolt There are still some bolts (they bolt in correctly in the floor) and I measured diameter. I think it's a 5/16" (about 7,9mm). But I saw that there are 5/16"-18 and 5/16-24, what's the correct one? I presume difference it's distance between threads but it can't tell what is correct. Rear seat bolt My '70 lacked also some rear seat bolt (backrest bolts). There is none! Can you tell me what to buy? Thanks in advance for any replay!