Hot rod engine and gearbox values?

[911hillclimber]

Nothing too exciting here, but over the last 12 months or so I've seen hot road 911 drivetrains asking prices with big numbers commonplace.

Such engines cost a lot of money, gearboxes too, so:

The hot engine in my Lola hillclimb engine is a nice spec and a bit unusual, so with the following specs what could it be realistically worth?
1
3.2 1986 base engine. Carrillo rods and ultra bolts, forged hi-compression pistons, Kent G60 cams and high rev springs.
Twin plug heads and electronic ECU, very lightweight flywheel
All rings, bearings, ramps etc all fresh.
All parts used for a safe 8500 rpm engine.

Flat fan custom made with stand alone alternator.

50mm PMO carbs and KN filters, as pic below. Custom equal length headers and silencers, no good for a 911!

Rolling road tested to just over 300 bhp https://youtu.be/Btr1ATBrrLc?t=23
2
Mag cased 915 trans with 4 gears fitted (deliberately) rebuild with several trick parts for strength by Mike Bainbridge, about 500 miles old.
LSD helical final drive. Currently arranged for mid engine installation. WEVO internal shift gate.

HELIX competition clutch with 'road spec' friction plate, proven to be bomb-proof.

73T 911 Coupe, r