Hey I have a good one that I can't seem to find the answer to, even after lurking in the forum search lol. I'm currently diagnosing a fuel issue on a 1992 c3500 7.4L tbi. I was trying to find this fuel pressure tester https://actron.com/content/gm-tbi-fuel-pressure-tester and after talking to them it wouldn't be available until February. So I took that cp7817 number and put it into Napa and it crosses to this number BK 7001089. https://www.napaonline.com/en/p/BK_7...pressionRank=1. So I went with that seeing as how there was one napa store that happened to have one. Needless to say when it came in the napa number is not the same as the actron number like I was under the understanding. Didn't pay attention to the stock picture since they're usually not representative of what it actually looks like. So with that said I did end up getting the adapter for the schrader valve here since they had it in stock. https://www.summitracing.com/parts/anm-01800001320. now I'm aware that it said in this description that it is only for cp7817. After getting the fuel pressure tester from napa I know why. The schrader valve is left hand threaded so the napa fuel pressure tester will not thread onto it. Here is a picture of the schrader valve for that adapter. So does anybody know if there is a right hand threaded version of this schrader valve so I can use the fuel pressure tester from napa? Thanks.