Are wanting to get rid of the shocks that are the upper control arms,the 53 I had years ago had the same suspension and I was looking into using 55 or 56 upper control arms and shock brackets so I could use tube shocks.
If you look at the cost and availability of parts to rebuild a 59 Olds suspension you might change your mind.
I'm guessing the track width on a '59 is quite a bit wider than a '49, and even if it is close enough you're still dealing with old school suspension and brakes. You may as well rebuild what you have.
I used a '77 Cadillac Seville front clip and rear end on my '49 Cad and they are a perfect fit and you get 4 wheel disc brakes too....the track should be the same on your Olds.
If you are going to sub with a 59 frame, I am sure it will be too wide. My 48 would have the same frame width as a 49. I used a 76 Cutlass, and it was the same width as my frame. This made a nice riding and driving car out of my convertible
I ended up rebuilding the front suspension in my 53 after I was able to find a pair of NOS front shocks.
I had a friend rebuild his entire 47 Olds front end, only things he did extra were adding discs brakes, telescopic shocks and R&P. Still old geometry and handling but drives and rides way better now. More cost effective and time saving in the end doing it this way, plus sub frame clips are not allowed here.
Use 54-56 upper arms. 51-53 steering boxes are reciprocating ball and should bolt right in. Use Mobil-1 syn. 90 wt. in the steering box. lube the front end with Mobil-1 grease. You will think you have P/S.
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