Two or Three Universal Joints

[Gippetto]

I am about to buy the components to connect my steering shaft to a M2 front end with a T-Bird power rack. I am retaining my stock '47 GMC column and adapting it with a "column saver bearing" kit. I found it pretty impossible to measure the angle between the racks's shaft and the column so if its more that 35 degrees you need a three joint system. Under 35 then two will do it.
I know this has been done many times but I never noticed the details of the connection.
It looks tight between the rack's shaft and the frame so that might add to the jogs. Can any of you old salts tell me your experience? Thanks.