Would have to check my cam cards at home, but looks like the "744" RAIII M/T cam.
Be pretty radical in a low comp 350 with A/T.
Better in a 400 with 10.0 + c.r., 2800 stall, 3.42/3.55/3.73 gears.

What are the raised casting #'s on the center exhaust ports just above exh mans?
If you want extra clamp load for your exh manifolds, Spotts Performance has brackets that bolt to front and back of the heads and over the ends of the mans.

And if you want to use the convert brace, find or make spacers to put between it and the body.
Think "Pypes Performance Exhuast" makes a kit.