You have nothing to worry about...with the correct torque and correct lubricant (don't use the arp that comes in the package..)

You can use ARP bolts from 2-3 models(costs something like 25pounds)...you can even use ΑRP625+ series bolts...
Else you can use bolts that are used in the cosworth diffs..

On the other hand, whatever you use if the bottom end is not balanced you aren't doing anything..