Barry, go with a 3/4" front bar for now, I think you'll be very surprised at what it will do for the car. Comparing the attitude of your car and mine in the photos and considering we're probably going about the same speed you can see what the larger front bar does even with the extra weight of the V6 up front. Yes, I do have a very small rear bar, but I believe that it probablly isn't really necessary. I had the large front bar when the car still had the 1275 and it felt pretty much the same on the autocross track.