[Jesse Knapp]

One of the best tools I ever bought. Mine would vary a bit, not much. Since this is a crude or awkward sort of way to perform this while the engine is in the car I found that paying much attn. to position on the rocker and pulling with both arms while in as good a position as possible gave me close results. Also, I pulled it at least three times as well. After each pull I would reposition it again on the rocker. I had the most difficulty when near the firewall (69 camaro). Mine was Jesel shaft rockers (superstock) with plenty spring pressure. Hope this helps.