What Engine to go with

This mite be a dumb question but why has only one person suggest a 383. Does it not fit in the engine bay very well? It seem's like a lot more powerful engine. I've seen a stock 383 dyno at 335whp. I haven't seen a stock 360 dyno yet, but isnt it in the low 200whp? Can anyone give me a idea of what a stock 360 dyno's at?