was thinking about going for some higher gear 3.73 ratio'sin the XR8, , im just after some idea's on a good workshop here in adelaide, that would do a good job at good pricing, what would this sort of job cost approx ? is it much worth going from 3:45 to 3:73 ? are the JMM stall convertors applicable to all e-series as in v8's? would that be a better option ? Id much rather leave the motor alone.. chasing speed in different form..