i havent ran the motor since i got it. I bought it from the builder (Dirtworx) and he didnt run it much or get any times out of it. I had a similar motor to this before by the same builder and it ran a 3.93 with little tuning. I wouldnt be nervous
i did a search and it looks like they have been made since 2008. You can still purchase this same model new if you google it. I bought it used and the only reason for selling it is in my truck which only is driven for work and i dont need it gettin