I beleve that in the long run a LT1 would last longer than a LS1. The LT1 is just so much simpler, less wires and crap mainly.
I mean other than the opti spark that needs to be changed out ever 60,000 to 100,000 miles there isent anything on that engine. maybe thay should have just put better heads on the lt1

 

The amount of wires has nothing to do with it, theres an LS1 Vette with over 200K miles, plenty 98s have broken 100K, no sighns of slowing down yet.

 

yeah and theres a few Ive heard of with under 10k and piston slap so bad they have been traded in