No need. Just put in the redesigned (stronger) 3.5 rods in the 3.5 block and it will live a long and happy life. It's a low-RPM stump puller though, not the rev-happy powerhouse (well, relatively) that the 3.0L is. I still think intercooling the 603.96x is the only way to go. That assumes you have already gotten the full 148hp that it came with from the factory - proper cam & IP timing, good injectors, full boost and fuel enrichment, etc... easy way to test is by checking the 0-60 time against factory specs (with stopwatch, GPS, etc to ensure accuracy.)