413 vs 440??

3698830 would be for a 1973-78 440 pass car
3769902 would be the 400/440 1974 only cylinder head.
your 3830930 440-6 block is late casting 1974 block. not sure what the deal is cause it wasn't available in 1975 and up. compression is about 7.8:1 so don't count on putting in a decent cam or anything.