Thought would post some info in case anyone needs it in the future about bolt sizes and sources.
On my 1967 van, the lower bolt that goes through the axle, front shock and sway bar is a 1/2" x 6" Grade 8 bolt. They sell them at Home Depot. I bought two bolts, 2 grade 8 nuts and 4 grade 8 washers for around $7.
I also needed new leaf spring eye bolts. These go through the leaf spring bushings. They are Grade 5 5/8" x 4" bolts factory, I went with Grade 8 for the replacements. Here is the link:
http://www.autoandtrucksprings.com/products/Leaf_Spring_Eye_Bolt_Kit_Grade_8_5_8_x4_FREE_SHIPPING-708-87.html
www.autoandtrucksprings.com also looks like they have round and square u-bolts that might work if needed.
On my 1967 van, the lower bolt that goes through the axle, front shock and sway bar is a 1/2" x 6" Grade 8 bolt. They sell them at Home Depot. I bought two bolts, 2 grade 8 nuts and 4 grade 8 washers for around $7.
I also needed new leaf spring eye bolts. These go through the leaf spring bushings. They are Grade 5 5/8" x 4" bolts factory, I went with Grade 8 for the replacements. Here is the link:
http://www.autoandtrucksprings.com/products/Leaf_Spring_Eye_Bolt_Kit_Grade_8_5_8_x4_FREE_SHIPPING-708-87.html
www.autoandtrucksprings.com also looks like they have round and square u-bolts that might work if needed.