Originally Posted by Carl Fausett

...Yes, you can punch out a 4.5 motor a bit, we can go to about a 4.8 Liter with it, after that the cylinder walls get pretty thin. Usually, if you are going to spend the money boring and sleeving a block, most guys will start with a 5.0 L block. Boring a 5.0 block is same cost as boring a 4.5 block, so why not start bigger to begin with? ...

Originally Posted by Mike B

I would agree according to Carl's previous post. Looking for a block?