My Transformation 5.7 Gen 3 in 74 Dart Sport

I am assuming the MP springs would be set to the stock height(1.99 Inches installed height)on the 5.7 Eagle heads and need to be shimmed for the 6.4 Apache head(2.051 inches installed height) to put them back to the 5.7 installed height of 1.99 inches. Yes use the factory shims, retainers, and locks from the 5.7 Eagle heads, as far as I know with the MP springs. Yes to the cam MDS turn off and new tune.