We have an early O235C (100hp.) that we are planning on using on an experimental L-21. We have been told that it is an identical engine to the O235C1 and O235 C1B (115hp.) with the exception of the camshaft and carb. Can we really get an additional 15hp. just by changing out the camshaft and carb or are we missing something here?Or...is this the stupidest idea you've ever heard?Comments and advice welcome!Engine has not been measured yet.