aluminium head questions

Thanks for the pics and good info. I currently have the 440source adjustable rockers and figured I'll be able to retain them (MP heads use stock rockers). Is there any reason these rockers w/ be subpar for the mods I'm making?

What lifters would you recommend (that fit the stock lifter bores)?

Lobe separation on all the cams (my current flat tappet and all rollers in consideration) is the same (110).