Upgrade rod bolts or not
 

LM7 5.3/ z06 cam /arp head bolts/

the only time you need to change the rod bolts is if you plan on spinning it pretty high. if you are going to hang around a 6krpm redline, then sell them. if you are spinning closer to 7krpm then change them.

What r they a $100 bucks or something.. Don't be cheap man!!!$

Don't be lazy and cut corners/pinch pennies man. Its the little things that get you and end up costing you in the end. Been there done that. Just remember "Half assed equals half fast!"