Taper reamer available

[Marcmk1]

Hi guys i am new to this forum and would love to thank you for all your ideas shared. i am building my haynes roadster and have the ford scorpio uprights, as a donor( donor car is a ford scorpio, very similar to sierra but i wanted a v6 cossie and lsd diff at the end ), and came to the reaming bit of it, would you kindly let me know what reamer i need to buy or any kind of help please. only difference spotted at a glance is that my upright take a bigger diameter shock.
Happy weekend

Many thanks Marc