As said above, too much cam with the converter and gears, needs a dual plane and smaller carb. I had a pretty much stock 340 run your numbers with a 3.91 gear, but it was a 4-speed.

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!