I have a 50 gmc and I have a gap between a quarter inch to a half inch gap from the hood to the fenders i think the rear of the front fenders need to come up but then i thought my radiator support needs to come up too.
Could Be Often the radiator core support is missing it's under pieces (DPO) or the hood hinges need careful adjustment , esp. if there's a gap between the hood and the cowl . There's a couple hidden screws you can reach from under the dash but make _sure_ all else is good to go before you fiddle with the hinge adjustment .
Might as well toss in my $.02 on getting the hood and fenders to fit properly. First of all, it's not a one-man job. I've found that once you get the hood down tight on the cowl it's much easier to make any adjustment to bring the fender gaps into alignment. Put a 4X4 block under the front of the hood....resting on top of the latch plate so the hood is slightly raised. With all the underhood and under-dash bolts loose....have a person on each side of the rear of the hood apply pressure downward while pushing back towards the windshield. The 3rd person tightens the underdash bolts on each side....raise the hood, tighten the 2 bolts and give it a try. I've adjusted hoods absolutely flat when they had an initial gap of over 1" at the cowl. Of course, this won't work if the hinges are in really bad shape (loose and sloppy) but if they are reasonably tight, it does the trick without shims. The key is the 4x4 block to keep the hood slightly raised and having two assistants applying pressure both down and to the rear with their bare hands on the hood. BTW....the glove box does not need to be removed to access the two under-dash bolts on the passengers side. Once you get your hood tight on the cowl you can adjust your fenders until you have a uniform gap from front to back. More often than not, they will need to come up to meet with the adjusted hood. I don't loosen the rear bolts, just those on the core support. I might add that before you try to adjust any of the front sheet metal that you should make sure that the cab mounts are in good shape and that the thin mounting cushions are also under the core support. Dave
