I just recently purchased a 406 turn key from Skip and let me tell you, this engine is a beast !! It took me about 500 miles make myself drive it lawfully it’s so fun ! I totally understand waiting for something is a total pain in the $@!#% , but it’s worth the wait ,my engine was fine tuned on the Dyno before I received it and wow !! What a dream . The one thing I want to warn everyone about is make sure that your transmission will support such power produced by their engines ?? I knew my 4l60e was going to be my weakest link but my engine ate it up and spit it out in 150 miles! I now have a transmission built to match my engine and oh what fun it is ! Every car/truck intusiust that hear it can’t resist asking about it . I would and do recommend Skip White Performance to all that are willing to wait on very possibly the nicest engine available ! I agree that getting in touch with them is not always the easiest task but just be persistent! You will not regret the outcome. Thx to all that build for Skip and POWER on ,,