Your Mileage May Vary (YMMV)
but when I ordered a new engine mount and nose gear strut I asked for an identical mount for my 1995 vintage RV6A. The box arrived marked 7A. After installing the O320 and finally working on closing up the cowling I discovered the engine was approximately 1/2 inch forward of the previous location.
This required serious baffle trimming, fiberglass trimming, etc.
Carl