Well... before I would suggest any additional mods, I'd look at your driving first- You don't post any 60 foot time information. That info would give us a bit more insight as to your level of skill in the way you drive your car at the dragstrip. If your 60 foot times were very good, then I'd suggest some new things to try out. However, if your launches leave room for improvement, my advice to you would be to not add anything, rather, make some adjustments in your technique to allow you to make the most of what you have now. With a 98 MPH trap speed and a 3550 Lb car, you should be able to run in the area of 13.85 with a good strong launch...