Never heard of West Coast Engines. If you have doubts, follow your gut instinct. I have heard good things about BluePrint Engines and Summit sells them with free shipping which could be a big deal.
BluePrint 383 long block:
https://www.summitracing.com/parts/m...3ct1/overview/
BluePrint 383 fully dressed:
https://www.summitracing.com/parts/m...ctc1/overview/