I am looking at Holley's AFPRs on Summits website and they list 2 of them.

Part# HLY-512-501 Chevrolet/Pontiac: 1985-92 5.0L TPI Camaro; 1985-92 5.0L TPI Firebird, machined, adjustable fuel injection regulator $79.95

Part# HLY-512-502 Chevrolet/Pontiac: 1992-97 5.7L Camaro/Impala; 1985-97 5.7L Firebird, machined, adjustable fuel injection regulator $129.95

They do not have one that lists for a 5.7L 350 TPI. I assume the first one is the one I need but I want to make sure. Also, when I hook it up, should I find a way to use AN fittings or just go with some fuel injection hose and good clamps? I have never installed one before so I am not sure. One more thing, some people on here say when they are testing theirs they take "the hose off" Which hose are they talking about?

 

You want the first one(-501). I just bought that same one. I haven't installed it yet though. You do not need any sort of AN type fittings for this mod. There is a vacuum line that goes into it, this is what you remove and plug while setting the pressure. Make sure you get your current fuel pressure before putting the new one on. you use that pressure as a starting point. Also make sure you have new plenum gaskets and a tamperproof T10 bit to remove the old one. They should supply those but they don't.

 

Thanks for the info Brian. On the "tamperproof" T-10 bit. Is this one that has the hole in the middle? I have trox screws on computer hard drives so I am guessing that might be it. Please let me know. Thanks!

 

yes that's the one.