I am looking for advice on torquing (or just tightening) the forward 5/16-inch keel bolt on an MkI boat. The vertical clearance beneath the sole prevents the use of a medium-size or larger torque wrench with a deep socket. It does crazy things to the math, but adding one or more universal-joint adapters isn't getting me to a place where I can snug this bolt. Horizontal space around the bolt in the bilge is too limited for crowfoot attachments or extensions to rotate ditto a short-shaft torque wrench. This space, at least on my boat, is all too small for swinging a box-end, open-end, or even a crescent wrench on.

I got it hand-tight from ridiculously loose, but beyond that, there's no joy. My next fallback looks like a hinged breaker bar or a really short one (maybe cut down?), but I am not sure I can get 85 lbs/ft or anywhere near it.

Could you please share the tool configuration or method you used on this specific bolt? I appreciate the help.

Thanks,