Reputable Mopar Engine Supplier/Builder

Time to start the conversion from /6 to V8. I've been searching the web for a very reputable engine supplier or builder--a bit overwhelming. I don't need a racing engine, just one that will give me a good thrill when I hit the accelerator. I would appreciate any advice on good engine suppliers. I really want the most complete engine assembly I can get. The 340s seem a bit pricey and I was thinking that a 360 may help me save a little money. Thanks in advance.