Carter (Edelbrock) tuning questions.

I have an early Edelbrock carburetor on my 75 F250. 351M engine, 4 speed, 3.73 Dana 60. I have very limited tuning experience with these carburetors, although I have built a couple of hundred, I am sure.

This thing is very lean. I do not have the choke hooked up.....I live in Georgia. lol Anyway, when the truck is cold, it is so lean it will pop through the carburetor until it gets some heat in the engine. Once warmed up, it runs very well.

As far as I know, the carburetor is all stock. I did not built this one. I chanced it and bolted it on and it runs extremely well.....when warmed up.

I would like to richen it up a little. I have an Edelbrock tuning kit with springs and rods and jets. And I know changes can be made before you have to rejet. I would like to get by with just a spring and metering rod change.

How many steps rich would yall recommend? Thanks.