To straighten a pan, you can use a socket, bolt, and some washers to remove bolt hole dimples. Use a grade 5 bolt and washer at the minimum. You probably will wear out anything less before you finish one pan. You want the fastener end of the socket under the pan hole. Thick flat washers are best but you can double or triple up on thin ones if necessary.
If you have a spare block around, you can use it to straighten the rail. If the rail leaves a gap between the pan and block, which is often the case since pans are often pried off, bolt it to that spare block, using washers as spacers at the good holes and no washers at the bad holes, leaving a gap between the pan and rail the whole way around. Then carefully tighten the bolts at the bent portion of the rail until it is straight. If the rail is bent the other way, with it mounted to the block in the same fashion as above, use a screw driver or pry bar to carefully straighten it. For both, a little additional hammer and dolly work may be required. No pictures for this.
Lawrenceville, GA