Only if it were done by cowboys. The Rover is lighter than the Stag and that's always a better shift than making the nose heavier. It's also a
30+ year old car and wear in springs, dampers, bushes and balljoints is going to represent much more cause for flakey handling than minor engine weight changes are.The Stag is a huge great barge, but they do handle quite well for something that size, whatever engine is fitted. Watch the shock absorber quality though, because they're tiny and any of the heavy Triumphs is hard on them.