I am assembling my engine (307, mild upgrade to 200hp, cr 8.9), after cleaning, changing bearings, etc. Can I reuse the main cap bolts? So far they look fine. I know they are not expensive to buy, just takes a long time (and expensive shipment) to my place.

 

when I was building engines I always used the original bolts. never had a failure due to bolts

 

Same here, just be sure that you get the main caps back on the same ones you took them off of. Same with the rod caps.

 

I 3rd that. Those style bolts are reusable, it's the torque to yield bolts that aren't.

 

Thanks for the comments. Caps are marked, so should be fine.
I was stupid enough to buy a set of new small journal bolts...had to learn that small block is not small journal

 

It was back in the day before the large journal rods cam along. We use to spin a 327+.030 back in the early days to 8200 rpms, and it stayed together.