Thanks all for your help??? . I was afraid of what your answers would be , just hoping I was wrong!!! Getting ready , to start cussing it in .
I changed out a original 1940 Ford Coupe tank - set years with crudded up old gas and flakes. Got the original tank out OK - but tight. Bought new repo - Drake stock metal tank - had to take a 6 inch 50 grit grinder to the sides and trim slightly - then took a thin body shop bumping spoon to slide it past the frame rail. Repo fit little tighter than the original.
What he said--orig will come out easier than new one will go in-follow his advise-repo tanks need a little adjustment as he mentioned-both Drake and Tanks