I just started building a briggs model 28 i/c flathead with the arc dog bone and connecting rod but i just noticed that the cylinder bore is 3.3 inches (83.7)mm wide when it’s supposed to be 3.4 inches (87.7) mm. So i was wondering what piston should i get? One that is short enough for the arc rod and just 3.3in wide. Maybe the briggs model 49 piston?

Any help is appreciated.