Not Ranked
I've heard similar things to Brent's comments on the Al blocks--the estimates I've gotten are that Al blocks cost ~$3k - $5k more to machine and build than a cast iron block. I've heard nothing but good things about the BBM blocks. I haven't started building mine up yet, so I can't say for sure how much (or little) machining it will take, but I'm guessing Brent's pretty much on the money--square the deck, pressure plate hone, etc.
|