440 roller cam conversion parts list.

IQ52 said
You are going to need retainers and locks for the new springs.

What heads are you using?

Steel billet camshafts are going to require the bronze gear on the intermediate shaft.

The cam button is used to keep the roller cam back in the cam tunnel. Flat tappet cams are kept in the cam tunnel by the taper ground on the cam lobes and roller cam lobes are ground parallel with the cam.

Get a good, stiff timing cover for the cam button, like this AREngineering one...........

BB Timing Chain Cover | AR Engineering

Or weld up a stainless shim/washer or what ever in the cover to stiffen it, before setting the endplay on the cam button .
You can even shim the distance between the back of the water pump and the timing cover if ur carefull and precise , course u have to be , either way u do it. .007-.010 recommended endplay --------I did both.
Gotta watch the gasket thicknesses on diff. brand gaskets when changing something "down the road" too .