changing sbp 8 3/4 to lbp

car is a 70 340 dart with 10in drums on the rear. I don't want to drill the drums for lbp and it doesn't look like they do a lbp 10 x 1 3/4.drum, they all seem to be 10 x 2 1/2. To use the wider drums i'm thinking i would need the wider shoes as well.
Am i on the right track or is there something to change as well apart from the obvious axles.
I gather the width would increase 3/8in each side as well
thx