To Girdle Mains or Just Studs

Recently I got the opurtunity to finally tear apart the 440 that had lost oil pressure and started knocking in a dart I had purchased , anyway opon doing the tear down I had found 4 main bolts that had backed off while the engine was running (hence the loss of OP and knocking ) , I was amazed that on each main cap 1 bolt was holding it down , needles to say the block was CRACKED in all the main cap bolt holes , but fortunately for me everything else was savable , I didn't understand why they used stock bolts though , the motor consisted of forged mopar crank ,h beam rods , ross pistons flat tops , bullet solid roller &lifters , 440 source heads & rockers , lots of nice stuff in my opinion , anyway I got another block motor home 440 , and Im getting ready to get rolling is it best to Girdle the bottom end or will I be ok with ARP STUDS , Im trying to do it on a budget just wonder what kind of luck and opinions the forum has had