VS SS engine with a small cam, extractors. VN g/box, speed sensor from V6 conversions which allows for cable speedo too. Not the right speedo drive it's reading probably about 5km/h lower at 100km/h. Was told Memcal had been changed to suit.

Reckon I need a lower diff mainly - what rev's should I be doing if it was 3.55?

Thanks for the info