11" pressure plate has a 12 5/8" bolt circle.
10.5" or 10.95" pressure plate has an 11 5/8" bolt circle.

I use Mcleod 360951 B&B/Long 10.95" pressure plate. This model pressure plate has long style fingers with adjustable counterweight. (The picture below is for a slightly different model without adjustable counterweight.)

Mcleod 500 series ceramic/organic disc or 600 series full ceramic disc. (note that all Mcleod 11" discs are actually 10.95")

I also use a Mcleod Aluminum flywheel.