For 1970 the F, G, H, and M code power steering stuff is the same, except that the 302 and 351W engines, each, have a different front adjusting bracket. Both engines use the same pump and pump mounting brackets.
The 428CJ, and I believe 6 cylinders still used the 1967-69 pump and aluminum pump mounting brackets. I could be wrong on the 6 cylinder engines though.