I have a NIB P-80 plus if you need one.... Don't know if you will be able to do a Johnny Loop with it. At the end of the day without having an afterburner there is no substitute for the sound of lots of thrust!! I would fit the biggest thing in there that you can fit. Also consider fuel consumption of a big engine running at lower power setting as opposed to a smaller one running at full power all the time. Russ gets incredible fuel economy with his P-120 running in the f-16 because its hardly working except in vertical flight.