72 frame rivets?

[72blue]

Hi all! my name is James and I have a 72 k10 swab pickup. I got the truck back in 06 and have put a ton of time and money in it. The engine (sbc 383) is currently out getting a roller cam (last one was not ideal for street) so I'm tying up loose ends on things I never finished (glove box, ac, etc.)

To the matter at hand. I had the body off early on in this build, frame completely bare and cut ALL rivets off frame and powder coated the frame brackets and painted the frame. Brackets are bolted back in with grade 8 bolts (7/16). I've been told by some that I shouldn't have done this cause rivets are stronger/tighter fitting. Did I mess this up? Should I look for a place that can install new rivets? I am not concerned with the engine and trans cross members, however the front, rear, and main crossmember (the one that holds the frame together and the rear axle front spring hangers).

Help what should I do?
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