Isn't the LSx376 an iron block? Low compression, heavy assed block (totally unnecessary if a TVS2300 is your power adder), powdered metal connecting rods.....it just doesn't add up to me vs building an LS3 block based motor like it needs to be built for the job you're wanting to do. If the motor you have now is in good shape, it's worth quite a bit. Get you a motor built, that EXACTLY matches (no compromises) what you're trying to accomplish. It won't cost any more and you'll be much happier with the outcome.
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