geneh- I have a Fiber Classics F-86 (see pics), this is an excellent flying model IMHO this airframe is the ideal size F-86 for any 17-27 lb thrust turbines. The original protoype for the F/C kit won the World Jet Masters with a 12 lb+ thrust JPX turbine some years ago now! so your RAM 750's 18lb thrust would be near perfect for this size model. For example my F/C F-86 weighs 22lbs wet and flies perfectly with my TJT-3000 restricted to 20 lb thrust. Although currently this kit is apparently not available, I was recently told by the importer that the F/C F-86 moulds were being updated and the model would be available again soon.
That said there is the odd one or two that have been seen for sale here on RCU at times, so if you are interested in the Fiber Classics F-86 especially, try placing a wanted add for one here on RCU, I dont think you will have to wait to long for a reply