Mostly online anymore as most brick auto stores are poorly stocked or substitute low quality parts or out of spec parts. Rockauto is decent, GM Parts Direct and other GM part websites are good. NAPA online is decent and better than their brick stores. Advance Auto is ok, Autozone sucks on toast, they will ignore a line of customers to wait on their buddies first. Qjet parts specialty websites are the only way to get correct parts for your carb. Jegs, and Summit are decent for some performance parts. Specialty body supply stores and websites are the best for paint and other body work supplies, auto chain stores just sell crap in that regard.