I've resisted, and honed my carburetor tuning skills. Having an AFR meter
helps. The 850 on my 496 makes me feel more old school. Plus, I have no extra money! lol

I do not have either system, however I do have a Holley HP system in my Challenger with a F&B 6 pack injection system. I did have the occasion or 2 to contact Holley and never had an issue reaching them or getting a response.

As to your fuel system, yes you are going to need a return line. I replaced the entire system and used a Tanks Inc. tank with internal pump and then made lines using 1/2" aluminum tubing. You could go with one of the repop lines that are out there and just use 2 of them or you could go with soft lines as some have done; just make sure you protect it. You are going to need 2 filters; a 10 and a 100 micron to keep the injectors clean. Personally, I would not buy one of the fuel kits out there, you can make your own for less money. On my Cuda, I used the stock (albeit new) tank and then cut it open and added baffles and I am running an external pump on that one. They say the internal pumps last longer to which I cannot comment as both of mine are still working fine (the internal in the Challenger and the external in the Cuda).

The fuel system is the most time consuming and daunting, but it isn't that big of an issue. Changing over to EFI is worth every penny in reliability and drivability.

Has anyone installed a Borgeson power steering box?  It's supposed to give a firmer feel. I rebuild the front end and replaced the stock steering box (rebuilt unit). The steering is not very responsive and doesn't have the firm steering of a newer car. I know the car (70 Barracuda) is 40+ years old but the current steering feels loose. I appreciate any input.  Thanks

Looks like I am screwed. Neither Dales Cuda Shop and Classic Industries have one that fits a Challenger. Which I think is crazy based on the fact someone has to have come up with a solution for a little more gut room in these cars. 

So just to confirm that A AND B Body cars had a different column spline then the E-Body??

Chrysler made two steering column adapters that looked similar. One was for putting a rimblow or Tuff Wheel on a A-body or B-body early 70’s. The other one was for later 70’s like Cordoba, Magnum, Little Red Express. The later one has a smaller diameter spline which is probably what you have. It will not fit on the E-body column shaft.

Dales Cuda Shop and Classic Industries has the one you need, new and already painted black.

Thanks guys and 440 for your advice on my other thread too.