I had the .40 version of the P-47. I installed retracts and used an OS .70 Surpass. Out of the box it needed a lot of Heat gun TLC to get all the wrinkles out. The firewall must have had some up thrust in it as I had to shim the engine using down thrust to make the plane fly straight and level. The combo was awesome. It flew well and landed like a warbird should. (not a floater) I sure got a lot of attention at the field when I flew it. I saw the larger P-47 in the catalog and was thinking it would be fun to have, but I have too many planes now.
Good luck with it and if you need any more info on mine let me know.