Thanks for the comments guys! Yes - the 6.0 screams compared to the 5.3. It's also got exhaust, Tune, COld air intake.. But no doubt more power!
LOL that old tri-hull was a 78 - 18 foot SeaSprite. I got a call from a guy looking to sell it one day - so i had a look. This thing was amazing. Avocado green everywhere but it was 100% all origional and in PERFECT shape the owner bought it new, and used it once a year. Was a cool boat! lol