So im putting a new Engine in the Truck this summer. I've got a 383 rebuilt line up from a re-builder in my city with about 320hp to the fly wheel. It is 3600$ not installed. I was originally thinking of just going for a 350 crate engine for around 2000-2500. but was talked out of this by the mechanic. he said they dont put the best parts in them and they tend to break down. This the Truth? or is he feeding me bull?? appreciate any advice.