big block burning plug wires

The way you have them routed has a lot to do with it...been through this a hundred times.
Cylinders 2,4 and 6 should be routed UNDER the headers.
#6 is the only one that will give you an issue because it will want to rest on the header tube. Use a longer wire than you need to, and loop it toward the back of the engine twisted so tension keeps it curled toward the block.
#8 runs along the top of the valve cover and joins the plug from behind.
On the other side, #1 and 3 go under the front header tube.
#5 and 7 run along the back of the valve cover, and come from behind. No issue with #7, but #5 will have to be routed so it hits the engine from a 90 degree angle..or straight on.
It'll take some futzing around to get everything settled just right, but you'll never burn another one