Thanks to all for the replies. My flange was not pre-bent (guess that is the risk of a very early finish kit). Was able to add all of the curves such that I have less than a 1/32" all the way around.
Also found that my neck length was about 3/16" too long. Compared my neck length with that of 3 other builders. My neck length was 3/16" to 1/4" longer than their's. Cut it back 3/16" after talking to Gus at Van's.
Was a bit worried that I did something wrong.......All is OK, again, the risk of an early kit delivery.
THERE MUST BE A BETTER IDEA FOR A GASKET, between the fuel neck flange and the turtle deck skin. A layer of fuel tank sealant does not appeal to me. IDEA's???? A crushable, fuel friendly, tolerance freindly gasket material??