If you are:-)
I have a new, never opened Hanger 9 Spitfire, same as yours that fell down and mine that I flew into the cornfield, never to be seen again....

60 size & my Saito FG20 gasser with Keleo P51 exhaust manifold
( would work nicely on the spit too, just not exactly the right spot if it were entering a scale judgement).
That would be a great match up!
Prop it with a 15x9 3-blade to keep the speed down a little or go nuts with a 16x6 2-blade!
( I might have these props, maybe )
Either way, remember to beef up the horizontal stab, it was always the weak area and prone to flutter( or worse

)
I could probably include 7 dig servos, spectrum 2.4 receiver..heck, you could have the JR9303x with case also.