I got a set of summit headers on an 84 c10 with a 350 in it, not fitment issues other then the number 3 plug, it was kinda long so we dimpled the tube. It doesn't hit the starter though no where near it. Th summit brand at least for these trucks are flowtech headers, had flowtech part no. on the box. I personally didn't care for them because the collector points downward somewhat and not straight back. I had a set of flowtechs on my mcss and they pointed straight back but the pass. side sit right on the floor heat shield.