'69 D200 - Wheel fitment and IFS questions

[dubseven]

Hey all - two questions:

Looking to run a 16x10 or 16x11 wheel in the back - what is the ideal BS or offset to center the wheel? Running a 33x10.5W tire. Standard D60 rear end.

IFS Kits - looking at the Gerst or the Uncle Jimmys - can anyone point out any major differences between the two to justify the approx $1500 cost differential?

[MadMC63]

You'll be hard pressed to put a wheel of that size under the fender without scrubbing. I've got 15X9" on the rear with a 3.5 backspace. 275/60 15 tire. 11.00" of tread on the ground. The tire bulge clears the inner fender by.5 inch. You can definitely go bigger so long as you move the inner fender.