New build A833 18 spline with Gear Vendors OD.

That looks like a nice setup. Can you share who's flywheel you are using? What's your thought process around the lighter unit, ie why? I'm going to a 4spd from a 727 and am considering the GV unit because I'd also like to go from 3.55 to 3.91 or 4.10 gears. Just not sure if I want to try a TKX yet.
It is a RAM 1503LW flywheel. Lighter mass will allow the engine to spin up quicker.