Is this to much cam

No sir,
IMO,this combo is not able to accept a cam,any bigger than the stock ICA without the aforementioned mods, and even then it will be iffy,IMO. That's just a recipe for disappointment; been there,done that. At 8.0Scr, the Dcr is already down at 7.0, and the VP is nearly dismal at 111. Then consider the mileage factor.
Slap a cam in there and watch the VP fall to sub-100 slanty territory.
Fairly heavy truck, tall tires, short gears, and a stock TC; cam is not on the table,yet. For me it wouldn't be ....at all.
The duals and 4bbl, are a great idea.
Gears and TC, yes! TC first if on a budget. I found the 2800 to be reasonable in mine.
I had a 9.73 starter gear in mine with 275/50-15s. These were about 25.8 tall, so the equivalent gear corrected to 24" was 9.05. This was reasonable but not exciting. The back end is pretty lite, so I could get the tires spinning with the freshened engine and 2800,fairly easy. I had to fabricate a fancy torque arm on the pinion, to control axle wrap tho;Wheel-hop was brutal.