Need help with this vacuum reading

No, no manual brakes luckily. standard drums all around.

I was thinking a cam change may be in order...but I think that will need to wait til winter.

She isnt dying out anymore, so far, so the low idle in drive is the worst of it...and she stays running in traffic/at lights unless its a really long stop....at which point it seems like teh car wants to lung forward a bit....so I shift in neutral and all is well....

I have been driving her around and she does pretty well....like I said, low end is not great, but the 2.76 rears have something to do with that too....when she winds up, she really kicks in strong 2500 and up.....

I know that rear end ratio has a lot to do with what cam you get, and I know I am hoping to upgrade there a bit so wanted to wait a bit and see what happens......

With the J heads and eddy carb/manifold I have, what do you guys think I should be looking for cam-wise?