kennyd

Thanks for the replies, I should have mentioned that the car currently does not have overdrive, but I am  sure I will get the advice I need from the info provided! thanks again!

Who is the best person to advise on overdrives, ie required parts etc?

Does the alloy rocker make the top end quieter than the std metal rocker cover,(not that the valve gear is noisy) curiosity  more than anything ???

Can anyone advise tyre choice and size, suitable for my alloy wheels please (2500S)