From your list of current parts in the block, the only item that scares me a little is stock main caps. As you know, the combustion forces are trying to push the crankshaft out of the block and on to the ground. The stock, marginal quality, brittle iron, with like caps seems a little scary. I think at least 3 steel billet caps and studs would be a nice security blanket. Other than that, you have a stronger set-up than we ran at 1100 HP. You have to remember, when we ran the 455 none of these cool parts were available. It was 16-20 years ago. I would hate to say don't worry about it and then you have a failure, but I wouldn't be afraid to run your stuff harder for a year.
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