for a reference,
a 77 with everything in tip top shape, with all stock parts should light the rear untill only one is spinning and when rolling, chirp into second, and thats even with the 2.72 rear gear, or 2.92 cant remember
find out how much the head was milled, the shop near me removes almost 1/2 an inch, thats more than a degree or two on the cam wheel, i would watch the lobes when cranking by hand to figure out if your in the ball park, also it will let you know if you have gone too far because you will feel by hand if you start tapping a valve.
as for carbs, four barrels are too much unless you substain 4000+ all day long and dont need to stop and go, a 350 2bbl is almost still to much, i personaly found the autolite carbs on stock ford 60s 289 or 302 are the best, and the jets are super easy to change without spilling gas or taking the carb off the car