I put a .91 FS on a 4*60. To get the throttle lnkage set up, I bolted a straight bellcrank (made from a servo output arm, a screw and a bushing from a 90 deg bellcrank) on the side of the engine mount, just clearing the cheek cowl. The bellcrank is forward of the engine mounting bolts in the beam, so no strength issue to worry about. It also let me put 2 clevices in easy reach for adjusting the linkage. A couple of bends in the rod from bellcrank to throttle arm and a Z bend into the throttle arm. The pushrod from servo to bellcrank is essentially straight.