you will need to replace the hydraulic lifters ...
HT-2011 is the part number from summit

you will need new pushrods..they must oil the rocker arms thru the pushrods..

the one MP sells...alot of people say they are too short...

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)