The main advantage of using the BB Chevy type forged steel H beam rods is the better 7/16 rod bolts,much stronger rods than stock, new materials, less cost and weight The longer rods help reduce the side loading on the cylinder walls also I have a 464 C.I. 440 block pump gas motor that I had the stock crank offset ground down to BB Chevy rod sizes and increased the stroke to 3.900 or 3.910, CRS disease I used a 7.100 long BB Chevy type rod in that motor to help reduce the cylinder wall loading and help reduce the weight of the pistons also I'm building another pump gas 440 stroker motor right now that is 4.250 stroke with 6.800 long Eagle BB Chevy type rods, I'm using them because I had them in stock and wanted to use them up. I would have bought 7.100 long rods if I didn't have this set of Eagles on the shelf IHTHs