340 cam change, carb rejet suggestions.

Back in the early 2000s, I ran a similar cam in a 360 with aluminum heads. It wanted 14*minimum initial timing to bring the vacuum up. I ran an old 71 TQ on it, with factory jetting. It ran great like that at 950 ft. But we only see 100* at the highest here, mid 80s mostly.
I ran it with 1.6 arms,Hughes 1110 springs and their hi-perf lifters (circa 2000). With oiling mods that cam was still pulling deep into the 6000. I used to shift it at 7000/7200. just because I could. It also is a 4-speed, and I ran 3.55s,mostly.
Great cam choice with supporting Dcr.I ran mine at 10.9/8.8, with about 180 psi cylinder pressure. I squeezed some great fuel mileage numbers out of her too.
Sorry I can't help you with exact numbers but that carb went onto my winter motor, a 318, and I changed everything inside her to make that little 318 haul.