318 upgrades questions

Been told from people i know and trust one being the person i got the cam from that it'll work just fine even the guy boring out the block and work on on the heads said it'll be fine as long as i have the right gears in the rear end as of right now i do not have a good rear end for the car and i am looking for one and ocne i get it if it doesn't have the right gears i will put the right ones in it