Welcome Nastbscott,
the short answer - anything fits with a torch and a welder.....so you will have to define "...w/out major modification?..."
The '50 has 58" track width, your '70 has 63" if memory serves me correctly so you would need to source custom offset wheels.
While I acknowledge the M2 IFS setups, I am making my own front X-member for mounting GM metric chassis IFS. (Malibu, El Camino, S-10, etc.) The GM metric chassis is 58" track (S-10 is 54" track, same spindles, upper and lower control arms, slightly different roll centers, and geometry).
Scott
