That's my priority along with a new hood and exhaust, which are the only parts that really let it down.
Longlife built me my exhaust, very happy and half the price of milltek, if you can get to hayward and scott in essex they do some good jag stuff, especially for older cars. think you can even mailordr an new system from them
Won't that make it slower??????
Depends if you're making the driving pulley or the driven pulley bigger I guess.
Had to draw it on a scrap of paper but i think he's right
Changing the lower pulley from a 6" to a 7"
http://www.powerhouseautomotive.co.uk/content/jaguar-performance-upgrades.html
not this one but one like it, but all the info is in there.