[Thorin]

Based on your description, I am guessing that you have two, the ones with the rectangular rod bolt heads, actual 289 Hi-Po rods and 6, the ones with the football rod bolt heads, Boss 302 connecting rods. Not bad - the Boss rods are actually stronger than the Hi-Po rods, and they ended up being Ford's service replacement rod for the Hi-Po. I am guessing that all the rod bolts are 3/8 inch with 9/16 inch nuts - if the retangular headed bolts are 5/16 inch with 1/2 inch nuts, they are regular 289 rods - not Hi-Po or Boss.

My guestimation is coming from a book entitled "THE 289 HIGH PERFORMANCE MUSTANG" by Tom Gregory. The information about the connection rods is on page 10.

Dave Lowell