Approximately 38.310 in. Lg; 0.412 in. Min and 0.419 in. Max diameter hole in 1 place; 0.257 in. Min and 0.266 in. Max diameter holes in 4 places; side closure rail is used on a shipping and storage container (8145-01-116-9586) which is used to hold a cover assembly that is part of the f-100 engine