F4u, it was an owner request. The CB-3 is a more reliable and available engine. Contrary to what Mr. White said regarding the availabilty of the -18W, it is just not so. With the demise of engine rebuilders like Rudy Blakey and the wholesale scrapping of 95% of his stock, it is getting harder and harder to find these engines. Add to that the problems with getting someone to rebuild intercoolers and we have come in to a problem with the originality. Sure it can be done, but the cost generally is 10X as much.
The plan for this F4u is for it to be flown as much as possible. So, for the time being it will have a CB-3. BUT, an 18W has been aquired for installation at a later date. At that point it will purely be a QEC change to be original.