I have a 1991 RS Camaro I put in a new 350 engine but my flex plate didn't match the old trans so I use the old flex plate. Now I have a wicked vibration when I step on the gas weather I'm sitting still or moving. Should the flex plate be balance and if you think that's the problem does anyone know of a good transmisson place in Detroit or it's surrounding suberbs. HELP ME PLEASE!

 

Welcome to the forum, try posting up in the 3rd gen section, the boyz over there can probably help you out.