It can't be done. At least it always seems that way whenever I try to put one in. You need to loosen a lot of other nearby fasteners to be able to shoehorn the grill in without scratching the paint.
As far as access, you need as much as you can find, including through the headlight holes.
Carl

Last edited by 52Carl; 11/30/2015 12:26 AM.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission