I don't think so. With four strokes You can use larger three bladed props - very scale looking And that sound of two four strokes !!!
Just keep eye on the weight - Kyosho kit is quite heavy itself. Two Magnums .30 FS make 7 - 8 ounces more that my Mags .15... I didn't make any major modifications to lighten the model except to replace four standard servos in the wing with mini sized (GWS Park HPX).