I bought a used305 chevy for my 56 chevy pickup . I took the engine down to the shortblock, every thing looked ptretty good. It has the stock 305 flexplate. I put a turbo 350 trans and converter behind it. The converter was installed correctly, and spun freely to alaign up the attachment holes. The engine turns with the converter bolted up easily with a 5/8" socket on the crank. (plugs removed). I am using an in line bolt starter, stock chevrolet. When I attempt to turn over the engine, there is a slow turn, then clicking. The battery is fully charged. I even changed batteries from my other car with the same results. I removed the starter, it will engage when charged off the engine. I am thinking perhaps the solinoid is weak??? Any suggestions, before I spring for another starter.??