Please get an estimate from a dealer to use as a standard, at least you will get a job flat rate in hours. Then go shopping for a better price(hourly rates) from a good repair shop in your area. ted I need to do the rear main seal on my 87 csi. Droping the exhaust and tranny is probably more than I want to tackle on my own. What should a job like this cost me someplace other than the dealership?