Yes, the stripes would go the other direction on the pieced part. You can try the two long pieces and the split the remaining 30" piece into 4 pieces of aprox 10 x 30 and sew them end to end to get a 118" aprox piece and cut that down to the 102" and put it down the middle of the quilt lenghtwise, so that you have a long piece on either side and the long piece that is really 4 pieces down the middle between them. Then all your stripes would be going in the same direction. Do you have any extra blocks or pieces of other fabrics, You could also use them or any other coordinating piece down the middle.