the v12 is from AITM but I got mine when Dave first took over, and it is from the old molds and it needed a lot of work, someone posted one from his cleaned up molds a while back and it looks great.The engine fits good under the hood,even with the air compressor mounted on the back aux drive.
I used some parts from a 8v kit to get the look I wanted, and had to scratch the engine mounts. If your looking for 100% realism the exaust manifolds are wrong for a 12v truck engine, but for me I am not that picky.