i ran a billet dogbone with a stock (good) rod for three seasons on an un-governed engine with no failures whatsoever, wouldnt have bothered me at all to throw a cam in it along with a billet flywheel, but rules didnt permit it, even the 28's will shake at certain rpm's with the brass weights, on most i have seen it is low in the rpm band around 2500 rpm, but ya seldom ever see that rpm in a race engine so its never an issue, be fore warned tho if the counter weights do decide to vacate the block rest assure they will take everything with them including that high dollar cam, and dont be scared of the good briggs stock rod, George ran them a long time before arc came out with the billet rod!
i also had a 31'' with the 1.25'' crank in it, so they do exist, just not sure how common they are!
