Just as a side note, pparaska. I did a build up in my old 76 Vette awhile back. I put in a roller 383, Trick flow heads, jacobs ignition, blah, blah..and a 3:55 ring and pinion along with a Tremec TKO 3550. What a mistake. The tranny was great, once I got over the clucky shift. The problem that "I" had, was the 3:55 rear with the 3:27 first gear in the trans. I could give gas and had the shift "... oh !! in about... 3 feet" it seemed like. If I was to be aggressive off the line launching out of 2nd gear was the way to go. I might be blowing smoke, but that was my experiance with my heavy vette.