Diff ratio

["Jack W. Drews" <vinttr4@geneseo.net>]

I'm helping a friend prepare a car for vintage racing and need to choose
a diff ratio.

The car is an Elva Courrier, with a stock (at this time) MGA engine. The
car has an MGA rear axle with a 4.3 ratio. This seems way too low, but
some advice from the list would help.

The car will be raced at tracks in the midwest -- Blackhawk, Grattan,
Gingerman, and Road America.

Any good advice?

--

TR6 -- 29 and still running
TR4 -- 39 and still racing
uncle jack -- 59+ and still_________(fill in blank)