Anyone know spring bolt sizes?

[oldgold70c10]

When the weather clears up and warms a little I want to put my new rear springs on. When I do, I want to use new bolts. Does anyone know what size and length bolt to use for the top and bottom mounts on a coilspring rear??

[rage'nrat638]

i don't remember the bolt sizes but i do remember them bolts being a real pain in the well i would start spraying them now with something. every few days till your ready to do this job..

just a thought..ouch that hurt

[409biscayne]

If nobody objects i have a similar question . What size is the big bolt at the front end of the trailing arm , i want to replace mine with new .
Tks .................................... 409

[fastwillie 696969]

i would say 5/8 inch and i wont waste my time soaking the u bolts if your replacing with new
cutting wheel or torch works fast

[oldgold70c10]

I guess everyone reuses the old ones or just orders them out of the catalogs. They should be grade 8, right? Also, new spring clamps or just clean up and reuse the old ones? When I get around to it I'll try to take pictures & post them.