Guy's which engine would you recommend for a TF GS P51? I'm looking for an engine that is gas and will not force me to butcher the cowl. I currently have a Hanger 9 P 51 1.50 which has an RCS 180 in it I only had to do minor mods to the cowl (one other thing all my props are drilled for the 6 bolt prop hub I would like to keep using what I have.