'Ultimate' road S6 build shopping list?

[900T-R]

Awaiting the paperwork needed to be able to register the project Tuscan (cat C salvage) at some point, I'm putting together a shopping list for the engine build.

I've pretty much decided against an LS3 swap (as long as the original block doesn't turn out to be scrap, anyway) but that said, I'm not ignorant of the strong points of the LSx compared to the S6.

Hence, apart from the obvious one - reliablity - I also want

• a fatter torque curve and easy driveability in traffic

BUT I also want

• razor sharp, inertia free throttle response and linearity

Headline figures less important as long as 'significantly' better than OE (say 20-30+ BHP/lbs.ft over a 'good' S/Sag-spec 4.0 litre).

Discounting the FFF head for a moment, the design choices would come down to:

• RG 'ultimate' finger followers vs latest spec TVR Power followers
• RG simplex timing chain set up vs OEM duplex set up
• RG Helix clutch vs. TVR Power AP clutch
• 4.0 litre (OE pistons & crank with RG H-beam rods) vs. Power 4.3 litre kit vs. Power 4.5 litre kit vs. bespoke, oversize pistons and liners (and H-beam rods on 4.0 crank for near 4.2 litres capacity
• RG lightweight flywheel vs. Power lightened flywheel
• OE clutch slave cylinder vs. Raceproved slave cylinder

It would be fantastic if anyone would have comparative data/experiences on the above (y)

[900T-R]

O/T Andy, as soon as we can start dismantling the thing (we need to leave it intact to show it to the Dutch road autorities as salvage with the correct paper work before we can rebuild and subsequently have it tested and registered here) I'll be sending the throttle bodies down to you for having the bearing upgrade performed