hi everyone im new here and just got a mk 3 1.4 golf, anyway when im on the motorway etc doing 70 im doing somewhere between 4 and 5000 rpm and is rather noisy aswell as rinsing my petrol... any way to get this a bit lower besides form travelling sub 50

would it maybe be possible to fit a gearbox from a mk3 gti as it has 5 gears and not 4.
second question is any way to get any more power out of the engine, got 400 pounds (ish) to play with this month as it is a pain when it comes to overtaking etc as it takes time to pick up speed.
thanks for any comments and help and sorry if its another ameture question

fairly new to this car malarke.