Head gaskets and B5244T5 bottom ends !

[nobananas]

Assuming your R is a 2535cc 03>07 model?

If so, you'll need to have the B5244T5 block bored out from 81mm to 83mm then transplant your internals to the new block.
Highlighted your text above, statement is correct.
Don't forget you'll need to Shim the block also to prevent the now thinner liners from cracking.

Thanks for the reply Lee. Apologies my post may not have been very clear. I have an 850R which obviously has the 2.3 with 81mm bore and 90mm stroke. The later 2.4 turbo engine (as used in the series 1 V70R) has a 83mm bore and 90mm stroke but the 2.4 (B5244T5) used in the late series 2 v70/s60 t5's has the same 81mm bore as the 2.3 but has a longer stroke at 93mm to give it a 2.4 capacity. It was this engine I was interested in as it has thicker cylinder walls than the usual 2.4 or 2.5 turbos but is stroked to a slightly larger capacity. They come as VVT as standard but I assume I can throw my 850R head on the block without any issues.