I agree with MBHD on using the 2004R behind your 230. It uses smaller lighter internal parts and has much better ratios for you smaller motor. I think the 700 is a stronger trans and will stand more abuse but for your car I think the ratio spread between 1st and 2nd gear would hurt you, and I don't think you will have any problems with the 200 holding up. The overdrive will make a great difference on the trip to and from the track so you will win on both counts.
