Safe RPM for a 408" Magnum?

Thanks! I have a Hughes deep ported Airgap with their Big Gulp throttle body feeding a pair of Edelbrock Magnum heads that have been CNC Super prep'd and hand blended by Hughes Engines. The reciprocating assembly is the Hughes Mid-compression cast crank and Hypereutectic piston set-up.

I'm running 39lbs Ford Racing Injectors using a surge tank style fuel system. I currently am using a 3/8" feed and return line from a new stock tank, with a modified 3/8" pick-up and return sending unit that free-flows via a Carter pusher pump through aluminum tube and EFI rated rubber hose & clamps to a pair of Permacool fuel/water separators and then through the Radium Engineering surge tank with an internal high pressure Deutchwerks fuel pump.

The surge tank is mounted up front and flows through a pair of aftermarket fuel rails and back to the surge tank. I've had the fuel level down to less than 2 gallons at the Willow Springs road course with no fuel starvation at all. That is amazing given how easy this system is to convert a car to a high performance EFI rated fuel system with an inexpensive stock tank.

I used a '98 ECM for a 5.9 Ram Pick-up with manual trans from Solo PCM's in Florida without security and a HotWire Auto Hotrod harness. I had Chris at Performance Injection Equipment write the tune, which I loaded with an SCT Tuner. He knows what he's doing, and I can highly recommend him. It's really a cool way to tune a motor using a wideband to provide feedback to him, and then he emails me the updated tunes. I download them into the handheld tuner from my laptop and then load them into the ECM via the OBD2 port. The factory ECM can handle from mild to wild including supercharged etc.

Converting to EFI using this easy to build this style of system is about as plug and play as it gets. I don't have the time and patients to mess with a Megasquirt - figure everything out yourself style system or with custom "baffled" fuel tanks that hardly work better than a stock tank. Some of my buddies went that route and they still can't get below 1/3 tank without fuel starvation issues.

I'll be down in LA for Spring Fling in mid-April and will also hit Track Day at Willow Springs on the Thursday. It would be great if you guys would bring down one of your cars and hang out. It's probably the best hands on Mopar event in the world.

I was undecided about RPM AG EFI vs Edel SV EFI, I have both mag and la EQ's sitting on shelf so either way is easy. I have been looking for feedback on AG EFI in light car instead of truck. I will probably grab a AG and Big Gulp on my next order with Hughes. Racer Brown in working on my cam. I might consider using a SCT rather than just flash the pcm on this one so I can make changes. Wide band is almost like cheating:D. I plan on using a Tanks Inc tank and gpa 4 pump since they are sitting on the shelf. Had not figured out injector size yet but 34# seemed like good starting place.

I picked up a 67 GT Verrt thats been restored mechanically but somebody screwed up and the brand new rebuilt 318 knocks bad. I thought I would drop the 5.9 in to it for some fun with the 904 so I can concentrate on getting the 64 5.2/44 RE swap done first. I plan on turning my 69 Dart HT into my "track" car but that project is 6 mo down the road and I need to spin some tires sooner than that.

I will make a Willow run soon, havent been out there for 25 years when I was pit crewing on SCCA Endurance Series RX7. I drove SCCA solo for many years while in So Cal, looking forward to getting back on the track in a cool old Mopar. Thanks for sharing, Evan