727 Build for Mid-10s

Alright guys, I had a few minutes to mess around with this thing today and had a minor setback. I went to install the rear band and drum and I can get the rear band strut it. I can without the drum in place (barely), but then the drum won't fit. The only non-stock pieces I've got are the band and the billet rear servo. The strut is stock (I believe) and measures 1.32". Is it common to have to take .25" off the stock strut to make it fit? Otherwise, could I have the assembly installed wrong? Could I have received the wrong band?

Thanks a lot. I know these are stupid questions.

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