I would be concerned with the stock 11/32 rod bolts if you are going to wind a 250 up in rpm. In fact, I would be concerned about the stock bolts in a grocery-getter too.
If using stock rods, I recommend ARP rod bolts. Use bolts for early small journal small block (283 v8) application. Make, buy, or borrow a stretch gage. I've used a micrometer to measure stretch but a dedicated gage is much easier.
Recondition rods (resize big end) is recommended after bolt installation. However, I've run rods with new bolts without resizing and not had a problem other than asymmetric witness marks on the bearings upon teardown. Not ideal but better than a rod through the side of your block. Make sure the underhead and under nut seats are smooth and there is adequate clearance for underhead radius.
