Wonderful windows 10 has issues with outlook.com and my old email is dead and I cannot remember my password here so here we are . Mods if you send me a new password for my old account [ David J ] so I can get back into it this one is not needed .
THAT SAID it seems there are many opinions on this and none are like my version so here it is .
First step is the shield [ 16551 ] under the radiator , radiator , radiator support rods .inner fender skirts , hood and grille . This is the " foundation " of the front end and you need to get this all fitting nice with all the gaps right and tighten up the skirts where they fit to the frame and also where the deflector under the radiator bolts to them in front . Tighten the radiator down along with the radiator support rods and grille brackets on the RADIATOR ONLY . If you have done a good job of this your gaps and fit will be good to stay .
Now take the hood and grille off as they are just sitting there anyway . Now put the big fender braces and their little support rods on but do not tighten them past snug . This is also time to check heights on the big braces so the fenders-lights aren't cockeyed . Put the fenders on with ALL BOLTS lose and then put the center casting in place . Put the triangle pan on UNDER the fenders and yes the indents in the grille are clearance for the bolt heads . Tighten the bolts where the fenders bolt to the running boards making sure the fenders are tight against the frame . Align the big fender braces with the hole for the horn bolt in the tenders and install the headlight stands using the horn bolts . Put the carriage bolts in on the outer end of the brace . Tighten the big braces on the frame and then the truss rods between the front crossmember and fender brace . Put the grille back on for fitting purposes in front and when you get that to fit tighten all fender bolts .
Pretty hard to fit fenders if the " foundation " is off and besides this way the fenders have nothing to do with hood-grille-apron-cowl fit .
Not saying this is the best way but it sure works . Like fixing a car on my frame rack - you do the " foundation " first .
David J