Flat tappet to solid roller...

Loving this thread! Time to sticky this one IMO.

FWIW/FYI

Crane makes the gear that Hughesengines has for what ever cam your going to run reguardless of its metal make up.

Crane Cams is the only manufacturer I know of that makes iron gear roller cams. There part numbers end in "IG" which of course stands for iron gear.
And with that, you can run your stock, MP upgraded intermediate drive shaft and gear.