The Javelin uses 2 1/2" rear springs, the American 2" out back. You would have to monkey with the perchs. Chryco makes a 2 1/2" installation kit, so you could go that route on one end. The other end can be adapted pretty easy. On the front springs, what is the stand alone height of the Jav V8 coil versus I6 springs. I swapped these two springs on a 72 and they were a drop in swap. The 68/9 Jav is different though, due to the trunnions. But is the jav I6 spring shorter than the American I6 spring. I am running Sc/Rambler springs in my 65 232 and though stiffer, not unbearable. In fact, with the complete Scrambler suspension under the car I get favorable comments on it's ride.......Russ __________________________________ Discover Yahoo! Get on-the-go sports scores, stock quotes, news and more. Check it out! http://discover.yahoo.com/mobile.html