Whats It worth? Slant Six complete drive train?

An original car in that condition is worth leaving it alone.
That’s certainly one mans opinion. My thinking is a car that awesome deserves a 6.1 hemi, twin turbos, and a suspension and tire package that makes it awesome to drive. Once again it’s a rare (one of 2200ish so we’ve been told) slant 6 manual car, that don’t make it valuable.