Show me your 340 ignition wiring looms/routing

Not sure that this really helps you or not, but here's a couple of pics from when I pulled my engine that show just how much room you have to work with
for plug wires with Dougs headers on a 340.

View attachment 1715269921 View attachment 1715269922
Yup with those headers you don’t have that problem! Nice headers by the way!!