Plug lead order is a bit complicated...
Cylinders are numbered
1 - 2
3 - 4
5 - 6
7 - 8
As you're sitting in the driver's seat, odd numbers on the left bank, even on the right.
Order on the dissy cap is: 1, 2, 7, 5, 6, 3, 4, 8
The two leads on the dissy closest to the front of the car are 8 & 4 (8 on the left as you're sitting in the car). You'll see they're arranged with two leads facing front, two rear, two left, two right.
It's hard to explain without a picture... Doubled check the firing order in the haynes manual, but I don't think it shows the order on the dissy cap...