750 Edelbrock issue

you can google the carb manual on the internet and buy individual metering rods and jets and using the tables go one or two steps leaner economically, but best would be to install an oxygen sensor and A/F meter for accurate results.I have done that and once tuned you can use it on many vehicles.
...i'm betting you can just bolt a 600 or 650 on, set your idle and needle valves and enjoy