also if you are just replacing the broken one most any machine shop should be able to have on hand the 11/32" connecting rod bolts for under $2 each with no wait on shipping. if you do spring for the arp set just toss the extra 4 my way. hahahaha the main studs or bolts are for the main bearings. i can't imagine you breaking one of those i bet the cast in the block would give way before the main bolt. good luck curious what you end up with. hr