Hi. I'm planning on rebuilding the suspension on my 1974 Spider and I have a question about springs. I may end up replacing the springs because with 50 pounds or so in the trunk (in addition to the spare, jack, etc) the rear of the car sags noticeably. I have a 1990 Spider and was wondering if I can transplant the front and rear springs from that to the 74. On the Classic Alfa site, they sell Series 2 replacement springs and Series 3 springs. I was wondering what the difference is between the two and if it is possible or desirable to swap springs. I've done a search but can't really find anything. Another possibility is to just buy a set of Series 2 rear springs. Thanks!