Not sure if this helps but I will throw here anyways.
I'm not sure what your power goals are but I'm doing pretty well with my stock 6 bolt bottom end. Previous owner rebuild the bottom end, rings, bearings, bored .020 over, etc. Pistons are still original and so are the rods @ 225,000 miles! WOOT WOOT! Anyways, just make sure it's built correctly. Maintenance is #1. I've been told that the stock blocks were able to push over 400hp...but haven't personally seen one yet. As for mods, Evo3 16g, 2g manifold, 3" exhaust system, 550cc, 190, fmic w/ solid IC pipings, act 2100, HKS mega airflow MAS, DSMLink v2.
3 Years ago, the car dyno'd at 199awhp/203awtq with the big 16g, stock IC, crappy street tune with afr's spiking to 14 at the 5.5k mark /ubbthreads/images/graemlins/frown.gif. I'm positive with a good tune now and the mods I have, I should be in the 250-260 range or more...depending on the dyno I go to. I tell you now, the car is REALLLLLLY fun as it is. I can't imagine how much more fun it can be if I can go with e85 + FP HTA68 + 1000cc injectors + 255 fuel pump + tune. I know that my trans won't be able to hold it though lol.