Holley 390CFM tuning 258

That's the only problem with a big project you have to leave for "real world" reasons, hard to figure out where you left off! I try to compartmentalize projects I know I'm going to have to leave. Break it into small projects that can be done in the time I have... or think I have (doesn't always work out...). You see some progress that way and easier to NOT get discouraged due to the time it's taking. A rushed job is never a good one! 

I have my beast R154/AX15 transmission back in and gotta finish bolting it up this afternoon so I can use the starter to fire it up
I have a question about valve cover ventilation since someone mentioned a vacuum leak.
I have manifold vacuum sucking crank vapors through the back elbow of the valve cover. This elbow has a 1/8" hole in it so that it only sucks a little vapor out and then I have a breather/air filter in the front valve cover hole to let in fresh air.
I'm wondering if this is technically a vacuum leak that may be affecting my ability to tune the carb
Usually this breather would be a hose connecting back to the air filter.
That seems like sort of the same thing but I thought I would check.

I test drove the car a couple times around the block. Car was accelerating but felt like it was lacking real grunt. Also had a "fart" right off idle. I'll be taking the carb off today to see where I was with jets etc from tuning last time. The mix seems lean. I'll try resetting idle mixture

I opened her up. I had the 48 main jets and the 33 squirter. I think I'll put the 31 squirter back in to get back to the Clifford recommended starting point
I replaced a vacuum hose and nipple cover that were a little cracked. I think these were in better shape a year and a half ago. The power valve is 8.5 because my vacuum reading was 17
Seems high?

I did set the transfer slot but don't remember how exactly. Maybe it was a square?

I think the transfer slot is supposed to be square so I'll fix that and put it back on