Yes the 730136a is the replacement/superceeded part adaptable for recreational (spring return) throttles to use on small frame engines if your fine with the later style look (with the spring they supply its early 1980's up, If you use the short spring its 1974-early 1980's lookswise. Blackwidowmotorstports is showing the old style repro's on their site currently as well, which are very close with exception to some of the nuts they used. The holes on the mount assembly are a direct fit to ones your backplate has from the factory. your era engine they were screwed on, by 1971 they were riveting them on.
I did a little writeup on those a few years back showing how to get full throttle control out of them like they were made in earlier years and also some basic info about the springs etc... that may help if you go that route:
Throttle controls info