Thanks again Dave. My car will be used mostly hiway cruising since I live outside of town, but with some in town driving. I am not really sure which transmission is the best. I fairly familiar with the TH350 and 400, but the 700r4 and the L series transmissions I am not familiar with at all. I see many people building their rods and using the 700R4 but don't know what they offer over the 350 or 400. The price you have to pay to learn I suppose !!!