The rebore puzzles me to be honest, having seen a bare block and worked on a few, they do not have a lot of meat in the cylinder block unless they have changed the crank which I doubt.
They must have.
I didn't think you could go much over 3.0/3.1 on pistons alone...must be a stroker crank.
I suspect 'modified' crankshaft either means 'changed to a longer stroke crank' or it's been offset ground on the big ends.
At the cost of the conversion, I'd expect a long stroke crank.
So a lower revving, torquey 3.2.
Doesn't state the cam choice either...
I can't believe a reputable tuner would go to the lengths of a new crank, pistons, cams, Schrick manifold...and keep the standard valve sizes either!
Must have Schrick valves...+2mm.
At the cost, I'd expect so.