Well, I'll be the one to say it - keep what you have and just drive the wheels off it.
In the lsx vs small block thread you said it runs 10.6 quarter miles. And now you want 100 more hp. It doesn't make any sense unless cost is no object to you.
I love the lsx platform, but you are talking about spending a boatload of money for an extra 100 hp that won't make a bit of difference on the street.
An lsx does do everything better than a gen 1 small block, but unless you are really stepping up the hp number, ie to 600-700++, there is no reason to throw out everything you have now.
When your current engine needs a freshening, no question - go lsx. Or by then, the new direct injection platform may be the hot ticket, and an LS3 might look as current as a TPI engine does now.
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