Muncie M-20/21 or T10 users?

I don't want to get in to an argument here but nascar teams use ether specially built Jerico wc4, or G-Force GF4A road race,or a Tex Racing T101( G-Force west ) This are face plated trans. with road race sliders (no synchros)and billet every thing in side and a nascar spec 1 1/4 29 spline input. That richmond t10 for $1800 probably wouldn't last 1 lap in one of those cars. Nascar trans cost in excess of $8000.00 dollars