I have a gen1 small block chevy. I'm looking at upgrading the ignition, and I have about $200 to spend. I currently have an HEI Delco unit and I believe it's the cause of me not being able to dial in my engine. I've been looking at MSD Streetfire distributors and Summit Racing brands. Although I would like a box I know it's not a necessity and for $200 I know I have a snowballs chance. Anyone have any suggestions?