When I've lengthened a body Lolli, I just draw a line across the waist, and put a cross mark over it (to match both sides together). Cut your strip - I would cut 2" to get !". Again draw a line across, to match to the waist.
Cut the pattern apart, put the strips underneath, and match all the cross marks. Adjust to the length you need, tape it in, and hopefully that will solve your length issue.
Any probs, just ask. I'm not the best at describing techniques.
Jessie