I will be putting a standard 2 litre blacktop into a Quntum H4 (Fiesta Mk3.5 si based).

The car already has a 1.6 zetec, rather than using the 1.6 ib5 box I thought I may as well change this at the same time to either a 1.8 Fiesta diesel box, apparently the ratios better suit the 2 litre engine, or an RS Turbo box with a LSD.

I'm not sure whether its better to go for the diesel box for the better ratios, or the RST box for the LSD - any views on this would be appreciated.