Well, this may be a bit different:
I'm putting the FWD engine/trans/suspension package from an '87 Olds into the rear of a '62 Corvair. (well, it was a Corvair once upon a time, long ago...)
I will use the subframe from the Olds as a starting point, as it mounts engine, trans, and lower control arms just fine...
I intend to set it up to bolt into place, rather than weld in hard. This should make life much easier for engine and trans work, and whatever upgrades or revisions turn out to be needed or wanted.

Now, the suspension is typical lower A-arm, upper strut (McFerson strut setup.) This means that a lot of the tuning and adjustments will be different than either a beam axle or a dual-A-arm (sla) suspension.

1: how critical is the strut positioning, assuming that there's enough adjustment to set static camber? Does tilting the strut forward or back in the car affect dive or squat during braking or acceleration? What about tilting the struts toward the center of the car? As long as I can set static Camber, what kind of effects should I expect?

2: Should I set things up so that the A-arm pivots are level the same as in the donor car? Would tilting the pivot axis (by tilting the subframe forward or backward) have some important affect on handling or ride?

Is there a reasonable to visualize the whole process? I'm thinking of pulling the coils out of the struts, mocking it up, and just moving things through the travel to see what happens!

regards
Jay