I just did basically the same thing to my '73 4/4 this winter. I've only had it out a few times since, but the car feels great. I also replaced the leaf springs which were quite worn out at 50 years old.

The Rutherford is a simpler kit. The SSL is MUCH more expensive.

Paul

1973 4/4 "Henry A"
1953 +4 Flat Rad "Pug"
1984 Citoen 2CV Special "BeBe"
https://morgan34.org/