Hi, after some family and vehicle issues we have had to postpone our long term travel plans. Just had the engine rebuilt AGAIN, this time by someone who knows what they were doing. She is a 1916 with original 1600 gearbox, engine revs at 3k at 80kph, this to me seems a little high. To put less stress on the engine at highway speeds 100kph i have considered changing gear ratios without changing the gear box, is it an economical project or would it be cheaper to buy a recond 2 litre box? if so how many mods need doing to fit the box Thanks for reading.