LOL...I do that all the time as well. I did a part interchange inquiry after reading so many negative reviews of the Dorman products and ended up going with Raybestos WC9091 and WC9090 wheel cylinders. I will post the results once I give them a test fit. Right now the entire front diff is out of the truck....actually the only thing bolted to the frame is the empty cab....and it is getting ready to come off and onto my cab cart. I should be able to approximate though. Thanks again...I am so impressed and so thankful by the results of my inquiry ! -Steve-