I have a '62 28 horse Johnson-as written in other threads,I've recently got it ressurected and may or may not be at it's potential for powering my boat-if this is all it's got,I'd like to go with more power.In the back of my mind is a winter project of putting a bigger powerhead on or replacing the crank and rods,etc to stroke it into 40 horse(or more?)-it seems like OMC cranked out a zillion twin cyl engines that may offer me a bolt up bigger engine if I found the right parts...anyone know what my options are here?