318 build!

hi guys, looking at building a 318 to start out with in my 71 Dart, just wanted oppinions etc,

Im on a tight budget here, because i don't make that much money to begin with and will have very little left to spend.

76 or 78 318 block
I hope to just be able to ball hone it and reuse all of the bottom end parts
Dont know the casting # of my heads but plan to reuse all of the valvetrain
Would like to run a single plane aluminum intake with a 650 or so cfm carb

What would be a decent camshaft for this build that i can work off of?
Any other cheap upgrades to suggest?