Cowl and radiator support numbers missing?

Friend is looking at a 70 318 barracuda to restore into a 440 speed. He is wondering if he should walk away cause the upper cowl has been replaced and the front clip is from a 74 barracuda. The vin tag and door sticker says 70 but the other vin numbers dont match or they are missing. Should he buy it or walk away? Thanks
Author: Cudachuck