Given the spacers, some careful rubbing and the FITech TBs, I'd go for it. It'll run. Not sure I'd mess with any carb if I had the 3x2 EFI setup
Like some others, I am not a big fan of the stock rods if you are going to make some power. They are pretty strong, unless they aren't, and it's hard to judge from the outside. If they have new bolts, resized, and small end is good or rebushed, assuming a mag when it was done and a good balance, you will likely be fine.
It's just sort of like cylinder heads nowadays, by the time you do all that, you have a relatively expensive but carefully checked 50 year old part, but you can't see it all. Of course you can't see in a new part either, but it hasn't been trying to throw 2 1/2 lbs through the head for the better part of 50 years
Now, I have certainly used stock rods, the last 397 I did used resized, new bolts, and magged stockers, so I wouldn't lose sleep over it, but for anything making big power, I'd likely wait, or rebalance and use the strong but HEAVY SCAT pieces