Options for replacing the recalled mounts?
 

Initially thought, as others have, that the straps around the frame back to the engine were for grounding. After a bit of research it seems it was for the motor mount recall. Have a 1970 C25 I'm working on currently. Would be nice to clean up the engine bay a bit and ditch the cable straps (although the ol 350 throwing so much power that it snaps the motor mounts sounds like a good story to tell the kids working the counter at oreillys). What mounts have people replaced them with? I would like to keep it as original as I can. Though I did just pick up a 402 big block out of another '70 C20 so if there's an option to buy one set of mounts that works for sbc and bbc that works too. Not sure that exists though for obvious reasons.

Re: Options for replacing the recalled mounts?
 

The 1972 BBC mounts are the more modern clamshell design. I would also ditch the throttle rod setup and switch to a cable. That was the primary issue around the recall. The drivers side mount would break then jam the throttle wide open due to the rigid rod.