Ross has always been a good supplier for 6's and avertises in the 12 Port News. But I have used Arias (where Ross came from) JE, Venolia along with Ross and never had a bad product. Arias has been the best for me and I believe it's because Nick Jr. has always has a soft spot for inlines especially GMC's
Rods are a different story completely. Last time I checked Carillos were over $2K and Cunninghams were just under that. These are for ones about 8" long. There are some off the shelf Olivers over 7-1/2" BBC's that have been made to work but I'm not for too much offset grinding of a crank.
Good luck, Still sounds like a great project...
