Slow build 71 Scamp 440
Lookin' good-I dig it!
As for the hardware, you can probably pick up the correct one from a local Fastenal or bolt supply warehouse. If not, I'd just go for at least grade 5 hardware, and because I'm sometimes a fan of overkill, you could just go grade 8 hardware with appropriately sized flat washers from Ace or Lowes...