Adapting Ridetech Triples w/ T-bar to Chevelle stock lower a-arm

[BANKO]

I'm running into issues not be able to install stock bolts through the lower t-bar into threaded studs on the a-arm. Basically there is no head clearance to get a ratchet and the pocket on the a-arm is too deep for a wrench. I'd like the t-bar supported by the pocket. Thinking of drilling the threaded nuts for a 5/16 bolt and use lock but from the bottom and bolt from the top.