Edelbrock 1406 running lean

Just wondering who has experience with these bad-boys and what jet size you would suggest...

It's running lean now for sure,
it's a 318 block running 340 X-heads, 340 intake, cam, I'm not sure if it's stroked or not but it's very possible as this was a weekend dragster many years ago.

the 1406 electric choke I bought reconditioned and has the standard jets in it. any info would be helpful! Thanks!