I talked to a well seasoned autoXer with a 93 Si hatch tha has a GSR swap and he liked his SOHC VTEC motor better (for autocross).He says that the GSR is about 200lbs heavier and all that weight is in front of the shocks maing it nose heavy.He's really had to play with spring combinations to find one that works with that motor.I think he said he's running 800lbs in the front and 11or1200lbs in the rear.It's a pretty sick car,all gutted,roll cage,engine work,etc.I've been in his car and I've never felt anything like it.I hope this helps you out a bit.I'm not saying to forget about engine swapping,but just offering you some insight or perspective on the matter.