Hydroflame FA 7615 circuit board and ignitor

My furnace sometimes will not ignite and thus blows cold air until I shut it off. Not often, but often enough that I usually wake up in the morning with it running and blowing cold air.



I ordered a new circuit board and ignitor as the old ones are original and thought it wouldn't hurt to replace both at this point. The only troubleshooting I have done is to test for leaks and there is none. I have also replaced the blower motor.



Some issues became apparent when the parts arrived. The new circuit board is much smaller and the ignitor lead is in a slightly different location so the plastic housing will require modification. All the new connections are spade terminals as opposed to the old push on connections, which isn't a big issue for me to change as the ignitor came with spade adapters. However the original high tension lead is too short due to the changes and will require a new (longer) wire. This did not come with the kit, so I am wondering where to get a wire like this or if a regular wire will do. I'm guessing a regular wire will not do as there is writing on the original which says 250 degrees celsius.