From all the research ive been doing, the new 6XD-MTX is the best fit for a GT40, it was made for the Super formance GT40 car builds, and now Ive seen a few going into the GT40 builds here in the US. I know they also ran it in a Factory Five GTM build a few months ago, and beat the hell out of it and it was also quit the driver mentioned! The driver of the car races in Trans Am series and said it was the smoothest shifting trans he ever used/felt and it has a quick change rear in the back, so they were changing ratios in like 8 or 10 minutes and back on track, thats awesome...
So Ive been following them on Instagram to learn more, i think its 6xdgearbox on the instagram, they seem to have alot of install products for many performance n custom cars.
