all 3800's are 135" [F + G on that chart, measure it] .... your vin should start with 3G, and the GVW tag could have an 8800# rating, altho' 6200 is the "base" model .... also should have 2 stage rear springs

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot