Its a good block, heavy.
Only down side to the tall deck LSX, has a factory cam position, so you're limited on stroke size. Need spacers for your intake and maybe for your oil pan, 4.375" stroke hits the GTO oil pan, may hit others. Not many use a factory pan with this block.
Its a good block that would allow you to use a heavy thick piston for Nitrous/FI but I don't think i'd use this for an NA motor.