There's nothing available. You can swap in SOHC Diamante cams and gain top end performance, but probably lose some on the bottom end of the curve. If you can fashion a way to adjust the cam timing, you can find a decent compromise, but the only way to do that is:

1) Offset bushings for the sprockets, which requires drilling the sprockets, removing the locating pin from the cam nose, over-drilling the cam to receive a .25" locating dowel and a whole bunch of fiddling to get the cams timed.

2) A set of adjustable cam sprockets like these:



One of these days, I'll install them and find out which cams are best for the 3.0L SOHC engine and where they should be timed. <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

Frank