Comp 918s or Yellow LS6s
http://www.3.8mustang.com/forum/showthread.php?t=254614
While the Yellow LS6 springs are only good to .550 lift, so if your at .545 lift they will be close to there limit and it would be better to go with the Comp 918.
What Rockers are you using and what heads are these going in?
I agree on using them. I just tested some spring pressure on some springs last week and The yellow springs I test started binding right at 1.25" which is .550 at a 1.8" installed height (stock LS1). I don't know what the heights are on whatever your using them on, but that's something to look out for.
And just an fyi, I also tested some non yellow LS2 springs also .550 lift and they didn't bind up near as fast as the yellow ones. Must be the extra thickness of the powdercoating (or whatever it is) on the yellow ones.








