Ok. Now that I have come to my senses about porting and polishing the heads, I still have some money burning a hole in my pocket. I can get a T-5 case over here for basically nothing. It would require a complete rebuild, however. I see that G-Force Tranz offers T-5 guts that can handle up to 600 hp on the street. These are offered as synchronized, dog ring straight cut, and helical cut dog ring and all are rated up to 600 hp. Other than dog ring gears being noisier (and 70% more expensive), can somebody educate me as to the best way to go? I have 400hp right now but will be adding a shot of nitrous so I want the overkill of this 600 hp rated tranny. Also, what are the best ratios for street and occasional strip? As for OD, I am guessing that the .63 is the best way to go if I drop in 4.11s. That would give me a cruising rpm at 65 mph of 2241.