Bob - I did have some leaking in the back carb. I pulled and cleaned the needle/seat and that seemed to correct the problem. But, now I'm wondering if it is intermittent.

It idles clean - but then when I put it in N or gear - the RPMs drop and it doesn't want to run. It almost feels dead and then it surges when I give it some pedal - almost like a really fat blower car.

I always shoot cleaner in my bleeds - but I think I'm going to pull everything apart and clean them out to make sure.