Peak HP from LA block w/ no problems

Here's one of my favorites...

http://chucker54.stores.yahoo.net/340focrinbaa.html

Callies crank, Diamond pistons, Hbeam eagle rods, rings, bearings, internally balanced, $2050. It literally drops in, and you'll never break it.

A few notes: Cast cranks are always light in the counterweights. Mallory is up to about $75/slug, and you'll need at least two in most cases. Personal opinion, SIR rods will never be used in a build I do. I have used stock re-done rods over them, and I'm happy doing that. If you plan to use iron heads, and you can get away with them, the new Engine Quest Magnum heads are very, very nice for a street engine, about 2/3rds the cost of Edelbrocks when done, and with practice can run the old style valve covers. Get the dished Diamonds, set the quench right, and cam it right, and it will be amazing. Std open chamber heads can be used, but you'll be limimted to either dished tops down in the bore slightly with big chambers, or flat tops with big chambers and a big cam. Because the cylinder pressure goes way up with a 4" arm, and the smaller cams will ping. If you have power brakes, that is a big deal. Dont be afraid of overcamming, and dont be afraid of using too large a carb.