Wow, Wes, I never thought this post would get the interest it has.
I've been an advocate for using the skinny 352/360 rod in odd-rodd builds for years. I haven't ever broken one...but I also have not used one in a "race" motor or a motor I intended to take to 6000K regularly. I am building a 428 that will be using the skinny 390 rod, casting # C1AE-B for my '65 Cyclone.
As for the 352/360 build, been there done that. I am no engine builder, but I was never able to get out of my head "I had a couple 390 cranks sitting there, what if"?
When I built the .040 428 I had in my '56 'Bird it had all the toys, Edelbrock heads, Engle solid cam, M/T cross ram, TRW slugs. The thing ran hot in LA stop 'n stop traffic and I tried numerous things to fix it for several years. One day I'd had enough.
I bought a set of .060 TRW forged 352 pistons off Ebay for cheap. Took a standard C1 390 block and had it honed .010...instant .060 352. The pistons were in the hole .040. Not ideal, but a lot better than a 360. Could have probably fixed it with an offset crank grind but didn't. Stock skinny C1AE-A rods with ARP bolts.
I put the Edelbrock heads and a Crower copy of the solid 427 "A" cam, and a Scotty Vincent ported Streetmaster with an 1850 vacuum Holley. Also a vacuum advance distributor with a Pertronix and MSD 6A.
The car runs fine. If you go to a car show that has a cruise line, it's 100+* outside and you sit still for 2 hours idling in gear, it does not care. Has plenty of power...but it will not break loose the 13x31 tires. Hooks 'n goes. I always thought I NEEDED to put a 445 in it...until I'd actually get in it and drive. But still, in the back of your head...what if??
Have fun with your exercise. I did with mine. It'll make plenty of power to run anything you want it to, but a 390 will kick its ass.