@Eric N posted:How did you guys determine what bolts were required for the given location? Grade, length, pitch?
That's a big old can of worms.
long answer:
Short answer:
Grade 8 fine pitch for anything load bearing, SS for anything else. Every size nut/bolt will have a course and fine thread variant. I tend to use the finest pitch I can for everything, probably not necessary, but it's what I do. *
Someone will probably weigh in, there are some things that may be grade 10 (the bolts that hold the beam to the pan, for instance) but I don't know. That's where the donor car comes in handy as Wolfgang suggested.
*My philosophy is use the best there is. 50¢/bolt makes a difference if you're producing 1,000 of something for resale. Not so much on my one Spyder. Which is probably why I've spent $1,000< at Ace Hardware over the last two years.