Speaking of experiance with the like cam specs....
In a low compression late '79 - 318 w/a 904/3.23 stock tire combo in my '74 Duster, I used a slightly larger Crane cam on a 112 lsa.
Here it is FWIW; Crane Hydraulic Flat Tappet Camshafts 693941
A Cold November day video;
It did work with the stock converter but some extra stall wold have been nice, (just not cost effective for the goal of cheap thrills.)
The throttle response had a ever so slightly flat spot just off idle. Now that I see the choices above, the larger cam above has a few less degrees of duration and would not have that ever so slightly flat spot off idle. I was able to get 18 on the Hwy. with this set up. An overdrive trans surly would add a couple of extra MPG's I think.
Another benefit of the OP's engine is it is a 42 CID increase advantage, better breathing heads & intake that will make more torque,LOL, a few buckets full in that 9.0-1, 5.9 engine over my 7.8-1 - 318 engine. IMO, he will never feel a off idle flat spoot but just rocket off or pull away like grand ma with zero problems. With his intended switch in the future to 3.55's, this is going to be a really nice driver with good pep for sure.
A few other things would have been nice as well starting with wider tires and better heads & 3.55's! That would have made that 318 get up and go well! LOL!
Nether here or there right now. The car is long gone.