It might be period corerct, but I would check out the current offerings, I have heard (haven't tried it, yet) that alot of the cheaper new stuff uses crappy pumps (unreliable). All the newer stuff I have seen uses higher pressures than the earlier stuff. I have seen one of the Edelbrock setups from the '70s. It used a windshield washer pump. Not sure how reliable that would be for more constant use. The newer stuff uses the higher pressure to inject a finer mist of water.
I'm not saying it won't work (of course it does), just be carefull as it will likely be that you have to fab your own, as that engine isn't supported with that kind of stuff.
I know it works because I work as a maintenance inspector for an airline that is still running water injected radial aircraft engines. It makes a noticeable difference, either inside, or outside the aircraft.
