I think that motor is headed for trouble, if it gets run hard. The reason is the block. Don't get me wrong, I love Robert Pond's stuff, but I have one of his aluminum blocks and have gone through it several times. Every time I take it apart, there is evidence of cap walk; lots of fretting at the main cap and block interface. Now, the caps are super strong on that block, so I think the issue is the block itself. If you look at the Pond aluminum block and compare it to a Shelby block, the thickness of the block under the main caps is much, much thinner on the Pond block. It basically looks like the same design as a cast iron block in that area. By contrast, the Shelby aluminum block is much, much thicker. The caps on the Shelby block do not look to be as strong as Pond's caps, but I have never seen evidence of cap walk on any of my four Shelby blocks.
I also have a Pond cast iron block, and that one also has never shown evidence of cap walk. I would be comfortable going well over 1000 HP with Pond's cast iron block. I think the aluminum block is probably good for 700-750 HP, and I've run it at that level many times. But the last time I had it together at the 840 HP level I had a main bearing failure. Maybe it was unrelated to the cap walk issue, I was running over 8000 RPM, but its a concern.
If that car is not run hard, it will probably last forever. But if the owner intends to really use that horsepower, I'd be worried...