340 performance?

About 3 years ago I broke a 5.14 that I was running in my D50 and bought a chunk out of a Ford truck with 3.55's and put a mini spool in it. I only slowed down a half of a tenth and gained 1 mph and was crossing the finish line in second gear in the 1/8. Went from a best of 6.34 @ 108 to a 6.39 @ 109 in second.