I too, am currently working on re-doing my Barron Sprint, although mine is a 1981. When I read this I went outside to measure. There is no engine in it, but I read around 35 1/2" from the inside of the transom to the first engine mount hole. Also the v-drive center plate is about 90" off the inside transom. This boat is a circle-boat, so the drive runs off the front of motor(If that makes a difference). I just pulled out of the woods yesterday, and she's in pretty rough shape, sounds like my winter project. Hey good luck with your project, if I can help ya, just lemme know, it's worth it, I love mine.