My brother's EJ251 engine in his 2001 Forester (160k) is burning oil at a rate of a quart every 700-800 mi. It seems to me that its days are numbered, and I don't have enough confidence in my mechanical abilities to do a rebuild. I have, however, done engine swaps before. I found a super-low mileage EJ253 from a 2006 Baja locally for cheap. Will it be possible to do the swap, considering the AVCS on the intake valves and the use of drive-by-wire and a MAF instead of throttle cable and MAP?