hyd roller cam retro ?'s

wanna put a hyd roller camshaft in a 73 360.
?#1)are there any drop-in variable duration hyd roller lifters?
?#2)any camshafts that use the std. gear for the dizzy and oil pump drive
instead of a bronze or composite gear?
?#3)is there a spray on coating for added protection of the lobes?
Thanks! Bob