Deano- The 3litre conversions?
Bloody spacer plate added to make the block taller for a start!!!
Cyl liners isnt exactly ideal either! (Reminds me of IMA

)
RB26 blocks are mega strong, but once you adding spacers and liners thats a bit out the window!
And MEGA money.
Fook that! Even in Japan they using RB30 blocks now on GTRs, the OSG conversion seems a waste to me.