balancing

I want to build a fresh engine and am wondering if I get a .040 bore do I need the engine balanced? Otherwise, it's many new parts and a mild cam to go with a slightly modified exhaust.

What is it going in and how are you going to use it. It is better to have it balanced will help bearings last longer. But I have just had the block bored and put new pistons in on rebuild and not balanced on a street engine. My 69 f100 when i built it 12 years ago I put .040 pistons mild cam in it never been a problem but it is only street driven. It only sees 5500 rpm at times. My Ranger I had it balanced but it is drag racing only and gets turned 7200 rpm. If you are buying new crank,rod  and  pistons get them balanced.

My truck is used for towing and hauling water. Nothing radical. My truck seems a bit tired,217000 miles. I just want it fresh so I can count on it. A bit more power.

What year truck is it?

1992. I thought I read something about the EFI FORD having the balancer internal?

1979 and later were external balanced. Even for a stock motor, it is wise to have it balanced.