If my 32 valve V8 Toy engine would mount directly to a Chevy tranny for rear drive, like they do at Nascar, I’d buy another Malibu to rebuild... then it’s mortgage the s***house and grab yer socks grannie, we’re goin to Bonneville for blue slips!
Why not just use the Tundra 5 or 6 speed?
I'm sure you could fab up mounts and have a driveshaft made.