ITB'd MK1
worthless in 5th. A gearbox is a torque multiplier, 4th is the only gear that's 1:1 (or close enough)
without question. Power runs should always be done in 4th.
A lot of places do it in 3rd to get a higher figure
i had my power run done in 3rd
cos it would not turn rollers in 4th :rasp: