MeMike, I think it's time.......

Are you planning normally aspired or power adders? If youy are planning on 12's or better, I would suggest haveing the head done by Mike Jefferies. The head is the key to making power with a slant six. There is a piston/rod package available from K-1/Ross that is a good deal. Unless you are planning on a long time project (shopping price on parts) This will not be inexpensive. Car prep will require subframe connectors, spring relocation for tires, and a roll bar or cage depending on the ET expected. You will need to keep the car weight below 2,500 lbs.
For those that don't think a slant is a viable project look at these links. All slant six powered cars, at slant six races.
http://www.slantsix.org/galleries/index.htm