I installed a Sure Fly EI last weekend. The O-320 E2D is equipped with electric priming with SS tubing and brass fittings to all 4 cylinders. I removed the priming fitting in cylinder 4 and replaced with nipple for MAP to the new ignition. I now have an open primer T below cylinder 4 that needs capped. I was hoping to not have to make another line from the main T behind the engine to cylinder 2. Does anyone know where I can find a cap that would fit the existing T. My understanding is the threads are 5/16-32. Any help would be appreciated.