The SF-335 is a light fighter aircraft. Canard design with forward placement of engine and twin tail. Armed by one 30 mm cannon and 3 12,7 mm machinegun. Also can carry two 250 kg airbomb and 4 rockets air to ground.
It looks cool but I must agree with those who worry about getting it balanced.
If you switch places between engine and cockpit - and want to keep the prop in front - you'll have an engineering challenge to get the drive shaft past the pilot while keeping the fuselage sleek. You'd probably have to relocate the guns too.
A pusher would be simpler ... just make sure to give the pilot an ejection seat. Then you'd have a lot of room to put interesting weaponry, or something, in the nose