Thanks for the replies. I am still a little confused

. So far I am taking it as I will need a 67 -68 chevy radiator support (if so, who has one??). I can't use my 72 chevy support with a 67 -68 hood latch, right? I have noticed as well that parts book always list them separate 67 -68, but have been told the only difference was the places along the bottom to bolt the splash apron to. Thanks for your help everyone, it is appreciated.
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67 short wide 355ci 3 on tree
69 short wide 250ci 3 on tree
68 long wide 283 3 on tree
72 2wd Blazer project 454 5 speed