360 Cam Opinion

The 360 (#1) on the stand was originally intended to be a re-hone and put back together motor that I bought to replace the 318 currently in my Duster. Of course, I can never leave well enough alone. Engine #2 was going to be my all-out effort with the higher compression, oiling mods and most likely now the solid flat tappet cam. This begs another question, I have a brand-new Speed Master adjustable rocker setup that would be great for engine #2. Would the factory bolt-down rockers be sufficient for engine #1 with the .490 lift hydraulic cam and 340 type replacement springs? I've heard, but never seen, that the factory rockers can fail when subjected to more lift and spring pressure. This cam is an Oregon Cam regrind and the ramp rate shouldn't be as aggressive as something like the Comp Cam XE or Lunati Voodoo grinds. I already understand that I'll lose some lift with the factory rocker arm ratio variance. Like a lot of us, I don't have deep pockets for my hobby and would rather spend the funds on #2 engine. I understand I could have just built #2 first, but it came around after #1 was started. Thanks for the inputs.