first the deck hight is only 9" on avg.. i would run a 5.7 rod if your going to run a power adder later.. the 6" rod is pushing the top ring to close to the top. the crank will work and the 5.7 rods will work just buy the pistons for a 400 with 5.7 rods like nitro said.. ROBOT were did you get the info for deck hight.small blocks 9" a big block is 9.8..