You may be able to draw it in.

I bolted my brackets to the frame first with some extra long bolts thru the frame. I just started the nut on the long bolt leaving everything loose

that allowed me to kick the bracket in a bit to start the bolts thru the bumper to the brackets, again using long bolts. once I got a bolt in every hole I tightened them up slowly

then changed them out 1 for 1 for the correct length bolt, and button head for the bumper

if was fun fun fun

DADS50
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1950 chevy 3100