i have a 200 block here, and was wondering if its worth having it linered to return down to std bore size

it was bored out to 25th about 4 years ago as i was going to use cosworth racing pistons but change of plans i sold them and the blocks just been stood in my shed

the boresd have some slight suface rust on them

just wondering what sort of power a linered block could take

just std liners not nikisil

thanks