I am working on a 25hp Briggs Vtwin motor (model 446777) that has rod knock that I would like to rebuild. Mine has a date code from 2001, and according to the IPL requires the crank and rods be replaced as a set (P/N 699701). Can anyone tell me what the difference is between that set and the regular rod (P/N 699699)? I have a damaged one from a newer briggs vtwin from 2005 and in comparison, they seem identical, except for the newer one says "VT on the rod and the cap. Any help would be greatly appreciated!