The 360 build that has more turns than Willow Springs

Since it has been awhile since I rebuilt a "small block", I'm a bit fuzzy on the details.
This engine had 9 ARP head bolts on each side and a stock one where the "long" bolt goes. I've been wondering what may have caused the head gaskets to blow out. Some have suggested that detonation did it. Others have stated that an improper tune was a contributing factor.
What about improper clamping force?
The LA and Magnums use a 1/2" head bolt but only 4 bolts around each cylinder. The B/RBs use 7/16" bolts but have 5 bolts around each cylinder.
The ARP bolts in this engine measured between 1/8" and 1/4" shorter that the stock bolts do. That can't be good. I measured...the ARP bolts extend only 5/8" past the head surface. Taking into account the thickness of the head gaskets, you're barely exceeding the width of the bolt with the engagement of it to the block. Is that enough?
I'd think that you'd want more of a safety margin than that.