Yes, with the bending loads due to the stack up, blower pulley on top of damper then threaded to hub, I would be putting something quality in there.
First choice would be something ARP selected by shank length even if you have to remove excess thread from the overall length.
Step up from that would be studding it with ARP hardware.
Big blower pulleys hanging of the SB Chevs tiny crank snout is bad enough.
When you add in the extended length the LT1 adds, it gets scary.
The added benefit to the torque head set up is if the damper works loose or the key shears due to blower load, the engine shuts off.
Witnessed this recently.
May I recomend re checking the damper bolt from time to time.