Hmmmmm, why would it need to be a 340? They are all small blocks, mostly 360's and some 318's. But they all have the same type compressor. All I am looking for is mainly the ends to bolt to the compressor, the condenser, the evaparator and the filter dryer. As for all the rubber hoses, I can have new ones made for any length I wish. I guess if I had a set that was correct , I could take them and compare to my finds. Just hoping someone had already "been there and done that". thanks