[Carol J]

This photo shows what I think I need to do i.e line up the front seam (shown by the ruler) so that I can easily continue the side seam. The straight of grain line will not be continuous but the piece will still be straight. This seams to me to lengthen the front bodice but not alter any other aspects.

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   20231127_163536_resized_1.jpg
   

[Carol J]

Thank you @lightningmcstitch for your replies and the link. I think I’ve now done the back bodice but I’m still unsure about the front bodice.
I think I may not have explained myself very well. I’m attaching a photo which I hope will explain better than I’ve managed with words alone. If the straight of grain continues across the inserted piece from the top half to the bottom half of the bodice the front and side seams no longer line up. I can’t see how to grade these seams without substantially changing the shape. If I use the outer lines I will effectively widen the bodice as well as lengthen it.

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   20231127_163355_resized.jpg
   

[Carol J]

Thank you for your reply.
I’ve only just started, but unfortunately I’ve got a little stuck. I’m increasing the bodice length by 1 & 1/4″ along the lengthening line. I’ve never done this before & according to my sewing book & everything I read, I should keep the grainline straight through the separated pieces, but if I do this the seam lines are thrown out, especially on the front bodice. I’ve now realised this must be because the front bodice isn’t cut on the straight. Before I alter or I cut anything out, I just want to check that I should keep the front seam line straight. And on the back bodice is the best way to avoid a bulge in the side seam by straightening the cutting line between the side seam notch and the bottom of the armscye? Thanks