Advise.
I know its off season, but I would try it in the spring, and if it is too much of a wheel stander, then I would advertise it for sale with the wheelstand as a picture in the ad. If you sell it, then you could put what money you got from the sale and the money you would have spent on updates toward a 4 link, strut chassis car.
And you would save the time lost to an update.
If you can control the leave at the line, it may be a keeper.