[TR] question re draining fuel tank

[don at napanet.net (Don)]

I have a '66 TR4A which I recently purchased that has been sitting 
for quite some time.  It starts and runs, but I would like to drain 
the fuel tank mas the fuel in the tank is old.  My car is the type 
with solid rear axle if that makes any difference.
Is there any trick to draining the fuel tank?  Is it accessible from 
below the car?  Perhaps this is so simple an operation that posting 
it here is silly, but I just wanted to make sure there are no strange 
issues that might be lurking.
Thanks!
Don Scott