After 4 yrs of building this car, and massive amounts of money, which is a 1967 Mustang fastback with an all 2003, 2000 R Cobra drivetrain, brand new 2003 Cobra crate engine, I'm hit with the absolute deflating news that there is a significant knock coming from cylinder #4! This all comes within 2 weeks from the delivery date. I'm being told it could be the piston or a wrist pin. I'm going to try and upload a video of it so you guys could comment, but right now I'm just absolutely sick! My file is mpg so I might not be able to upload it. Any thoughts?