bending is NOT the answer! tho' they should be adjustable up/down & front/back - the hinges get worn so they're not tight enuff to deal w/ the spring tension - try using the hinges w/ no springs and see if hood works right - if it does [it will], need to replace'em -
check your favorite vintage parts place , as they're being repo'd for the 55-57 now and they're excellent quality [Brothers for one has'em, prolly Carter and GoldenState, etc]
Bill