273 rocker arm adjustment

what brand of camshaft is it? must be old school cuz .472" is not high-lift today. the stock 340 had .442" lift. 40 pounds closed and 200 pounds open is less than a stock 340-which was about 90 closed at 1.65" and 240 at 1.20" . the 7821-16 comp cams pushrods at 7.23" would have been fine. 273 engines ran fine with those rockers without all the work u did. roller rockers will work fine with no machine work. I hope the springs have more load than u figure or she will have valve float and bounce at more than 3000 rpm