The info that Bob posted was in respose to me, I really liked what he did and wanted to copy. You know what they say about imitation!
Here is what I did with Bob's inspiration. This was before the car got hit :rant.
Some other stuff that went into this look, also much of it sourced from Bob.
McMaster-Carr
http://www.alloyboltz.com/
The majority of the body bolts are 5/16"-18 x 7/8" length.
For the Export brace, you need 4 of the 3/8"-16 x 1" length bolts.
The bolts for the fenders are "Flat Head Socket Cap Screws". For the bolts, Alloy Boltz is the better resource - they can sell them to you polished or unpolished. PLUS, he offers the correct 7/8" length for the 5/16-18's.
McMaster makes you choose either 3/4" or 1" (I found a mix worked best, as 1" was too long for hood-to-hinge, and 3/4" was too short in other places!) Mcmaster.com only offers unpolished stainless - you CAN polish them yourself with a drill, scotchbrite, and polishing compound. Not hard to do at all.
Here's what I used:
1/4-20 x 7/8"
Alloy Boltz PN # 25SF87
Mcmaster Carr PN # 92210A541
5/16-18 x 3/4" - Mcmaster Carr PN # 92210A581
5/16-18 x 7/8" - AlloyBoltz PN # 31SF87 (PREFERRED)
5/16-18 x 1" - Mcmaster Carr PN # 92210A583
3/8-16 x 1"
Alloy Boltz PN # 37SF10
Mcmaster Carr PN # 92210A624
For the Countersunk finishing washers, I STRONGLY preferred the Nickel-Plated Brass ones from McMaster.com. They offer stainless, but the nickel-brass is lower profile with a better appearance. You WILL NEED a finishing washer with each bolt, as they have countersunk heads.
Part numbers are:
1/4" - 92922A029
5/16" - 92922A034
3/8" - 92922A035
For the Whizlock nuts (aka Serrated Hex Nuts), once again Mcmaster.com is the preferred supplier - you'll want 20 of the 5/16-18, and 4 of the 3/8-16 per car. The 3/8 are used for the export brace, while the 5/16 are for the outer shock tower cover and horns.
5/16-18 - 93776A441
3/8-16 - 93776A461
For the engine I used a polished allen head kit from National Part Depot, part # 6000-1KD.