Darton Sleeves, good for RB26?

[kyledude351]

How do theses sleeves hold up in the RB26?
I've heard some mixed reviews and I'm looking to sleeve the cylinders in an N1 block soon

[Skym]

A sleeved block is good enough for 7 sec runs in a drag GTR.

As far as I know, HKS have a special order block (using I believe is a N1 block) with spacer plate (also extra head studs between cylinders to keep the head from lifting) with sleeves, custom internals. Same spec shortblock they use on their 7 sec R33 Drag GTR and on some other GTR dragcars.

Kakimoto has a similar RB30 kit (high block) with using I believe is a N1 block, sleeves, spacer plate, custom internals (crank, conrods, etc) to suit -

http://www.kakimotoracing.co.jp/04-00_engineparts/04-02_engineparts_rb.html

[Bruizer]

What in the world would cause a guy to need sleeves on an N1. More stuff to go wrong. Unless it's a worthy risk cause you have 1 200 whp.