AEM troubles

New development: AEM finally got back to me!! A little late, since I already pulled the trigger on the MegaSquirt gold box. But their offer gives me pause. They'll give me a ~$460 trade in value on my old AEM/MP Grey box toward an Infinity Series 5 ECU. I could then modify my existing harness terminals to connect to it using their plug/pin connector kit. This is a very attractive option since it frees me from having to take the EFI harness out (and intake manifold) and allows me to recoup some value from the grey box. This means I'll potentially be back on the road sooner and for less $$. The Infinity setup looks very solid and also appears to have a lot of great features w/ custom tune-ability. Then what to do with the MegaSquirt Gold Box?? EFIsource probably won't take it back since they made a custom harness for me (coils under intake). I guess I could use that on a 2005 5.7L hemi that I amazingly just came across for $700 and put it into my lady's 69 Valiant. Though this would be a "low budget" hemi swap using a '73 Duster v8 K-frame and 904. Though that's another story and I'll be picking your brains about it later. What do you think MS or AEM?

Edit: Oh yeah, AEM said they've seen the issue I've had with the MP grey box before, and it's not good. It usually required replacing an eprom chip which they can't source anymore. It's great knowing the problem was "real" and that I wasn't out of my mind chasing down a bad connection somewhere.