What size threads are they supposed to be? I tried my uncles tap and die set on one of the bolts and nothing fits without ruining the threads.
They are the ones at each end of the core support. Two up top per side with two more on the backside, one facing the battery and another facing the PCM.

 

Got it. Tractor Supply had a thread gauge. The bolts are M6x1.00. Sadly, my uncle does not own a metric tap and die set. Tractor Supply had the proper bolts, but stainless only. Too much bling for my taste. I prefer black phosphate. The only black phosphate bolts they had however were all cap screws. So, i went to a small time hardware store. No luck there, either. But i did find new nuts and bolts for the shocks and bolts for the rear bumpstops in black phosphate (grade 8), so it wasnt a total loss.