Very mild 318 - Comp 252H vs 340 cam?

I'm with RRR's assessment, and
IMO
If you already have a 3602bbl cam, I would just drop that in. It's a 252. but low-lift. Tons of torque in your 8.94Scr engine.
Also, IMO, instead of spending all that coin on an 8.75, I would get me a higher stall convertor, in the range of 2600 to 2800,
I love my 2800. This is how it works in my 68 Barracuda;
the 2800 allows my 4bbl to wham open right at Zero mph. But I don't floor it yet. The rpm spools up, then at stall, it feels like a big ol' pick-up truck just snatched me out of a snowbank, and my car LEAPs off the line; I love that feeling. but sometimes it spins, and then, I do floor it! lol.
This 318 of mine is the low-compression 1973 model, all stock except a TQ/small-port iron intake; and with headers and dual 3" full length pipes.
I have run it with every gear from 2.73s to 4.30s except Not 3.73s ( I didn't have any)
I liked the 3.23s best for performance, but
liked the 2.73/2.94s the best as a DD, with the 2800TC.