Revving and ARP Mains

[Jesus5150]

I'm currently in the process of building my 350 in my 69 Longhorn. I plan on leaving the bottom end stock this year and building the top end. Next year i'll 'pick up a 4 bolt block and do a forged 383 rotating assy so i'm not putting much cash into the bottom end.

I Currently have a 2 bolt block that looks like it may have flat tops already installed. I got it from my uncle when he upgraded to a 454 and said it ran great. He didn't build it so can't verify what the internals are. But they are .030 over and appear flat. ANYWAY

I bought a Lunati Voodoo 280/286 Solid Flat tappet cam that i'll be throwing in along with Lunati Beehive springs and lifters that they reccomend as well as a valve girdle for support.

Ill be adding a set of aluminum heads, a Victor Jr intake and maybe arp head bolts.

My 2 questions are:

can I rev higher now that the cam/lifters/springs have been upgraded, knowing the rods, crank and rod bolts are stock?

Must I line hone the block if i switch to ARP main bolts (not studs, They're only 30 bucks)?