I doubt it. But it might with log manifold and small diameter headpipe. I don't know what you headpipe looks like nor the clearance with your old std pitman.
The stock A-body 68-72 hi-po drivers manifold is very close to the stock pitman. If you look at a 100% original driver headpipe, the diameter is smaller the the rest of the pipe and it's got a clearance dent in it. I had a original in my 340 Barracuda. And there was not 1" of clearance for a longer pitman.
If you've seen the good TTI mandrel bent 2 1/2" drivers side head pipe for stick 340 hiPo manifolds, it's real close too.