Hi!

Thanx for quick response.
The B6304F and the 850R engine share a lot of components, but I dont think I can use pistons from the S80T6, as the S80T6 has less bore(?)
The b6304F is almost identical to the s80t6, but the s80t6 is only 2.8 litre, vs. the b6304f 3.0 litre.

Though, the 850R has the same pistons, I've been told.

I guess I'll buy 850R pistons.

And yes, I will "underdrive" it, but if you change pistons, I've been told I can extract 500-600hp. The Norwegian who built twinturbo on b6304f told me this yesterday over phone. He had original pistons, only he modified them for lower compression.

I dont know which tranny I'll use, if I'll use sellholm or corvette, or maybe the getrag 265 or what it's called.

The corvette 6speed can fit without too much modifications, I've been told.
I think a 6-speed would be nice :-)

ps. check this out: http://www.warrensweb.com/volvo/transmission.htm

that's a 6 speed from 2000' camaro Z28, though, I dont know how much power it can handle.