Ben, the early SG brackets ran out before the creeper holes from what I've been told. When there was a problem tractor that failed post inspection they would roll those tractors to the side and finish them when they got the chance to. The serial numbes were the last thing to go on them before they shipped. It's very likely that yours got rolled to the side and got repaired at a later date. You have to keep in mind that they sold more tractors in the first year then they planned to sell total for production run. There were tons of changes thru out the production life.
What does your battery tie down look like?
