the liners have to be stepped else it will do exactly how you said drop down
the company i use a lot do a lot of liners for jag,ferrari old skool blocks
all v8
basically they cut the old bore out to the size of the liner, also step the block so the liner sits in
next they heat the block up and the liners on in liquid nitrogen to shrink them or sumthing
once ready the bore is siliconed and the liner put into the block
the silicon id imagine is to stop oil coming up between the liners and block
then the liners are presed into the block
then the block is machined flat again and then bored to what ever size the pistons are
thsi is how i think its done from what ive seen but never asked how each step goes about
bud-weis
my engine came out f a 4wd car, but has a 205 block in
everything on the car was 4wd bar the block
hence asking if its worth changing blocks, but it means id have to have pistons
but would like it std bore