the crossmember is just a hunk of metal?

If its not bent its fine. i dont see a reason not to get one from a junkyard.

 

www.car-part.com try them out and see if they have a crossmember.

 

Air crap is a f*****-over carb mani. M1 is a EFI designed by MOPAR performance for these engines. Zero install issues with the M1 and no fuel rail cross-over leak worries that may or maynot catch fire. Dual plane single plane only applies to carb mani not EFI where only air flows no fuel. EFI manifolds are smoothed plenum and runners and carb mani like the AIR crap is not smooth in fact the plenum floor of the air crap still has the turtle floor cast in which will cast turbulence within the plenum and runners. This is good for carb not so good for EFI. EDIT...5.2 pcm will run the 5.9 with no issues whatsoever . It will not run lean the pcm has more the enough flexibility it is only a 15hp difference. If we had to retune the pcm for every 15hp cuz the engine will run lean then after some bolt-ons like 1.7,headers ect we need a retune otherwise the engine will run lean. Hogwash Isay.

 

There is more to intake manifold design than just whether it is dry flow, or wet flow. Single plane manifold is going to move the powerband up a good bit in the RPM range over a dual plane. Doesn't matter if it has a carb, or throttle body.

EFI manifolds are still raw castings on the inside. Casting technology may have improved, but, not a single manufacturer goes to any additional trouble to smooth the runners in the intake. At least, not on a truck......

The 5.2 PCM can indeed run your 5.9 engine lean. Under certain conditions, the ECM runs off of tables, and input from the O2 sensor is ignored. (Open loop operation. happens when the engine is cold, the 02 hasn't had time to heat up, or, at large throttle openings. Yes, WOT qualifies there..... which is the absolute WORST time to be running lean......) Depending on your build/driving style, you may be able to get away with it, but, it isn't an ideal solution.

The mopar M1 intake for these engines was originally a carb manifold as well.

 

Club,
I don't have any fuel leaks and won't ever have any. So Edelbrock installed some injector bungs onto a rpm-performer intake right before the intake valve. I not seeing how this is any different than the M1 intake?
And what makes you such the expert in the first place? You've come on here a few times spouting info and the last time it was wrong and had me chasing my tail for a couple of days. So other than it is a "F" up design what is wrong with it? And also explain what makes you the expert!!!!

 

Dude is just a troll. Ignore him.

 

Show me I need proof on this, yes there are carb M1 intakes for these motor's but its not the same casting whatsoever as the mpi 2bbl M1 intake.

 

I think you are correct on that..... the four barrel version is easily found without any provision for port injection, not even the bungs for drilling out the injector holes. I can't find anything on the two barrel flavor, other than the MPFI version.

 

Clubcab5.9 is spot on the F1 air crap is a reworked 4bbl carb intake and that info can be found on the web if you look for it. I don't want or need an 4bbl to 2bbl adapter thats silly thats making something work that it was never designed to do. Has anyone looked down the inside of the M1 intake other than me? It is smooth not baby *** smooth but smooth, mpi injected motor's don't need turbulence to mix air and fuel like a carb/tbi motor does. The smoother the better for a mpi injected motor. The F1 cross-over fuel line has leaked on many a person even started a few trucks on fire, injector area needs to be unshrouded for proper fuel spray yada yada.

 

I don't think anyone is arguing if the Air Gap was a non-FI manifold before and I don't see what it matters? As to fuel leaks and fires that is people not getting their fuel cross-over line done correctly. How many unit's are out there without issues? And if you upgrade to better lines it isn't a problem at all because you're using AN fittings.

4 bbl to 2 bbl adapters have been being used tons by more than just Hughes Engines. Mopar sells a kit for the 4bbl M1 with a 2 bbl adapter. So do tons of other companies.