Re: 351 & 2v heads & 4 bbl intake stock?
Not sure about the intake number as it seems incomplete but would perhaps suggest it was a Ford Motor sport part (after thought performance parts from Ford). The casting indicates 1970 for the intake, the block 1972. If it has 2V heads it can only be an added part since no stock C came with that configuration. The block will be 2 bolt with a D2 casting, very few C9, D0, and D1 blocks were 4 bolt, and they were not made that way but were machined after the fact for uses like 351 BOSS and some CJ,s with "M" code in 1971 and rare at that as it seemed they were using up old Boss blocks, but remember they were made this way not cast as 4 bolt.