"The most popular alloy race barrels are surely Steve Maney's..... http://stevemaney.com/products.html
750, 850 and 920.....and like you say there are other choices....will you be able to do a quality product cheaper?"
I'm not looking at race barrels, my intention is to produce barrels for road use , Dunstall replicas supplied with the same Dunstall cam followers , stellite faced BSA style, Actually the cam followers will be the single biggest costly part to produce.
Do Maney barrels come with cam followers?
I only refer to the fact these are race barrels because that is Steve's business, and I don't go to events where many road bikes go. I see no reason why Maney barrels cannot be used on road bikes. Certainly Steve will supply them honed to the size and clearance you want, cast or forged pistons or whatever.
I don't see why cast iron is not the most appropriate solution for road bikes either,but then again I never really understood why Dunstall bothered!, but that really is just me. For me, black iron looks right, especially with closed through bolts, and I don't thenk the weight and heat dissipation are real issues for stock bikes. As far as I know some racers prefer cast iron anyway!
I guess if I think about it I see little need for a capacity of around 780 to 810 either, when there is an easy 828 solution available, Dunstalls product disappeared quickly when Norton launched the '850'. But maybe its just the technical challenge of casting barrels and inserting liners you are after, I am sure it will be fun to do if you can.
Concerning cam followers, the answer is no, Maney's don't come with the barrels, but I don't think they come with anyone elses barrels either!
Standard Norton Cam followers are stellite faced and I know that from experience when that 'friction welded' stellite comes off, it causes a mess.... Of course they are flat not curved like BSA style followers, and from Jim Schmitt and Steve Maney practice, surely you will need to look at your cam profile if you go for curved followers? Maney needs follwers that are to be used with his cams to be reprofiled, so again the follwer needs to suit cam profile.
Andover Norton standard followers are pretty pricey, so you don't really want to grind new ones.....and I don't think they come with that 'high performance sand' they used to contain when Norton made them.....clean internally and externally before use!