How many times can rod and main bolts be torqued?

I must be the luckiest person on the planet! Back in the "bad old days" we street raced and ran the hell out of mud trucks with "dirt road rebuilds" all the time. These were our daily drivers as well! My friends and I had piles of core engines and would rob a rod out of one if we needed to replace one that spun a bearing. One 360 (I called it lucky) that I ran in a nearly 4000lb. W100 had three #7 rods in it. My 72 challenger had a 340 that I built out of a pile of cores I bought off a retired bracket racer. That motor saw 8000 rpm on a regular basis at the hands of a rowdy 17 year old. The only thing we took a motor to the machine shop for was to get a block boiled.