I am upgrading to an integrated airbag/shock and these are now for sale with only a few thousand miles at most. They have a rebound adjustment on the top that allows it to be made stiffer for track days. In great shape and a direct bolt in with the parts included. From what I can tell they run $175 each new, I am asking $200 total shipped in the lower 48.
I have to admit I am not a suspension expert but I would imagine for the SN years it should not be a problem.
They can be used as coil overs but I was running bags so I didn't have the kit or the coil. I will try and look a little closer at them to see if there is a model number as I can't find them on their site.
I believe they are the HQ series. http://www.cjponyparts.com/ridetech...garms-hq-series-front-pair-1965-1966/p/65FHQ/
They may not be the correct compressed and extended lengths if you had your car slammed. I'm going more for the road course setup. I guess I would need those specs.
I have been talking to ridetech to get the specs on these and hope to have all the info soon. If anyone is interested pm me and we can work out a price.