who makes best coil over front suspension

I would say that you may be making an uninformed decision.
I'm uninformed? So what torsion bar hotchkis setup should I be using to
install a Gen II 426 Hemi with full length tube headers in a 67-76 Mopar
A-body with wipers, a heater, A/C and a flat hood?

To the best of my knowledge there isn't one.

I do understand that HemiDenny built one some years ago (green Duster
in his signature) and it worked but it was an arduous task and not really
practicle with the advent of the RMS and HDK kits.

I appreciate you wanting to participate and though I would not devalue
the information you provided here, I think that you're answering questions
that no one asked and that they would be much better suited to a thread
regarding the best handling Autocross/Pro-Touring suspension package.

Would I like to have a great handling car? - YES!

Do I like the kind of cars you build and the racing you do? - YES!

Is the suggestion your making of any help to me? - NO!!!

In a thread asking specifically about coil-over setups, I don't know
why you're so hell-bent on sticking your nose in to discredit all coil-over
types in lieu of the classic hotchkis/ torsion bar type when that is not
the question.

Don't think I don't know what a really good handling car is. When I'm
not around Mopars my butt is parked in the seat of a long line of the
best sports cars that Europe has to offer but that is not the point here.

You're like the Federal Government. Only you know what is good for me
and it's not what I asked for.