MP 1.6 aluminum rockers

I have 1.5s now on my 470 stroker. To go to 1.6 would that mean a push rod change also? What about valve aprings? As long as I have enough piston to valve clearance am I good to go? Will the sweep pattern on the valves be out of whack? Thanks. Kim. Much appreciated
Oh, & congrats on the purchase, I had to really talk Myself out of those 'cause the low-deck project target for them is waaaay down on My priority list right now.....:)