318 value

Be nice to know the casting number.
You can bore some out 4-4.04"
Look on the sides if the block for what looks like circles/templates for the core/freeze plugs. In other words.. it'll have freeze plugs but you'll see these circles where it's almost like they were going to put them there and decided not to. Those are the blocks.
2536030 iirr


What years did they use those 2536030 castings????