1979 650SR starting point for jetting?

Ok I'm sure this has been discussed somewhere in these 287 pages already. What I have is a 1979 650SR with some kind of 4into1 exhaust and emgo pods and stock carbs. When I got the bike it had stock pilots (15's) and 110 mains. I'm unsure of the clip positions and have not touched the mixture screws yet.

The bike seems to run good. Acceleration seems pretty snappy but when cruising at 50-60mph , it's a total dog trying to gain speed.

So what I'm asking is if there is a known good jetting setup for this intake/exhaust combo. Again, sorry if this has been already discussed. A link to the previous posting is much appreciated if its already been gone over.

I recommend replacing the airbox. But, since you probably won't do that, do a search on this site for "pods". I believe all will be revealed (there are about a milion postings on the subjecy). Ed