Yeah, its about .010" more than the stock 250 piston and rod. Many want to use this swap because it gives them a cheap set of long rod pistons and they don't have to buy custom ones for $600 bucks or more. They can spend that extra to deck the block more or other pieces and still be out on the cheap side. The LS guys will give you a set of their take outs and you'll only have to buy the rods and do a little pin fitting and your good to go.
I thought the 181 were 5.7" but didn't have any real data to back it up before I made the chart, and then the edit button went away too soon again.
