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Guitplayer,

Attached are some screen shots of data I was able to find in a web search on "specs" for the '58 front springs (found at https://www.truckspring.com/) that may help you confirm these springs are correct for your planned use. I used the original GM Part Number "3719560" from a Chevy Master Parts Catalog and your vehicle info to help locate these tidbits.

Also included their diagram on how/where to take measurements of your springs to help compare with the listed spring specs. If you remeasure your springs and the numbers match these specs (A and B lengths, width, spring stack thickness and Arch height) you may be able to ring the "winner-winner-chicken dinner bell". (Just an educated guess on my part.)

Let us know what you figure out.

Dan

PS: Also included a snap of the rear spring data in case you may need that down the road.

Very nice!!!! Thanks. I will check that tomorrow. Its for my 1959
but should be the same as 58.
Hopefully it will save me some money.

I just went ahead and ordered new front springs.
Its too much work for me to gamble on an unsurity.

I think all will agree that the "safe" choice is always the wisest!

If you don't mind sharing, who did you order them from?

Also interested to hear your thoughts on product when you get 'em.

Dan

Sure will. The part s will come from Classic parts.

I plan to put the new ones next to my possible good ones
and the worn collapsed spring for a pic.

Tags arrived. Got it up to around 65mph.
Steering a little sloppy. I have seen worse.
Needs leaf springs. Sway bar..I have.
Power steering box. Just got.

Great, sounds like the weather and the tags arrived about the same time to allow a test drive.

Thats right! Dan pulled the 327 in my other truck. I will put
a M-22 RC in instead of the 3 speed OD warner. He`ll check some things inside the engine.
Put on a new clutch plate. Maybe upgrade the alt + Power steering brackets.
Its needs wider belts.

The front bushing I cannot seem to free up.
I have the "U" bolts off the frame and the rear bolt bushing out.
This one I cannot unthread.
Does anyone know a shortcut either cut the bolt or the hangers to
remove the leaf spring?

You can cut the shackle bars and deal with the bolts and bushings later. A replacement shackle comes with all that stuff. Once the shackle and spring are out of the way, use a ball joint press (rental/loan from your FLAPS) and push the bolts and bushings out of the frame and spring together.

[on edit} Actually you should be able to knock the shackle bars off the bolts, except the one where the nut is still on it (I assume you can get that off.) Take a hammer and large punch and drive them off the ends.