Pre A+ blocks do tend to fetch more money than A+ versions, especially if they're the version without the casting hole above the centre main bearing- as they're eligible for historic racing. But, if it's already bored to 73.5 or larger it's possibly not able to be linered.
I was told by MED that my old 1380 block couldn't be sleeved. MED was going to sleeve a block bored to either 73.5 or 74mm for project 63 and I was intrigued as to how they were going to do it as I'd previously been told by them it couldn't be done. They ended up replacing the block.
Edited by imack, 13 November 2024 - 12:29 PM.