But I stand by the clutch weight statement - although much of that may have been due to the machining required...
Yeah, machining custom parts on a small scale is gonna get expensive. The NASCAR ballast weights could be cut from standard bar stock, then milled to the final dimensions and tapped for attachment to the NASCAR specified standard sized frame rails. It appears that suppliers of these weights only add a bit more than 100% above the bulk price of tungsten alloy to each ready to install unit. Prices vary somewhat, but bar stock seems to sell for around 50 bucks a kilo. At 16 kilos, each 35 lb ballast weight would seem to have about a thousand dollars of margin available for procurement, handling, machining and profit. If I was Gene Haas, Jack Roush or Rick Hendrick, I think I might buy the bar stock in bulk and have the machining done by my own people. But only if the tax guy says it's okay!