LA blocks

Dartswinger70 said
For clarity 4.00" in a 318 is .090" over? and you've seen this? I personally would go over just enough to clean it up .010" at a time. But I am conservative and would want to get another rebuild also.

Yep .090" over. My brother bought a 318 powered valiant around 10 years ago that developed a knock after about a year of driving, we pulled it down a found a worn 4" bore and bearings down to the copper. That block was a Brazilian casting and was sent to scrap and a replacement motor sourced for the car. I also saw 2 more built on our Aussie forums before they shut down - one was an industrial 318-3 block and the other was a very early casting if I remember correctly.
Also ran Into a guy at a car show also with a 318-3 that claimed to have a 4" bore.

Dartswinger70 said
This is just a thought not based on fact but I would think or recall that the early engines possibly had more metal cast in them.

Ive heard this before also, mine is a '73 block so there may be some truth to that?