Big Block Tunnel Ram 660s Questions

So I pulled the carbs off. I was able to confirm. There are 76 jets in the primaries, no power valves, and rear metering plates are #12. I found it strange that despite the 1000rpm idle, the transfer slots were covered by the throttle plates. The secondaries were closed. So, everything I have read says the transfer slots should be visible below the blade by about 0.050" or a "square" when looking at it. I adjusted the idle speed screw to get the throttle blade/ transfer slots set. Now I worry about the idle speed being much higher as I had to adjust the idle speed screw about 0.100" ish. Anyone thoughts as to how I had such a high idle (exactly what I wanted) with the transfer slots covered? Will this new set up make it richer also?

440 low compression short block
Hughes whiplash 440 cam
Shaved, ported iron heads
Weiand tunnel ram
Holley 4224 660 center squirters
2500 stall rmvb
3.91 SG