HEY! Thanks for the reply.... It's REALLY hard trying to find someone who knows this stuff.

Ok to answer your questions, here we go-

I have a stock type points distributor. It's a reman so I have no idea how the curve is setup. I removed the points and installed a Pertronix unit and am using a Mallory Promaster coil.

I have the vac advance disconnected because I am getting a constant light draw from the 'ported' vacuum ports on my carbs and it's prematurely advancing the timing at idle. There is only one port on each carb to hook the vac advance up to and it's on the RH side of the carb on the metering block as a typical ported vacuum port on a holley would be.

As far as the inches of Vacuum at idle, I'll have to get back to you on that once I get a new gauge. It was less than 10 inches if I remember correctly. Also, i tapped the upper plenum for a PCV valve and tried running it. It seems to run fair but runs/idles better without the PCV valve hooked up. I'm also drawing vacuum for my power brakes and C4 tranny. The power brakes seem to work just fine.

I have jetted the primaries down a bit. It "seems" to be alright but is hard to tell without being under a driving load and able to measure the a/f ratio. I went from #58's to #54's in both carbs. The secondaries are stock as they are metering plates. (4160 carb with side hung float bowls)

I've also moved up the accelerator pump squirters from #31's to #37's and that seems to have taken away most of the off the line stumble. Also the powervalves were 8.5s but are now 3.5s.

The carbs I have are Holley 4160 model manual secondary (not doubble pumper or dual feed) They are 450 cfm carbs.

My linkage is setup to open both carbs' primaries at the same time. Hang tough as I'm going to have to purchase new vacuum gauges as the one I was using took a leap to it's death off my workbench the other day. I'll try and pick two Craftsman units up tomarrow since it's payday!

Finding info on a SFB with dual quads in a factory manual shows to be a real bear. THe only one I know of would have been the Shelby Mustang or the Shelby Cobra. Even then they were dual plane std. intakes and nothing like a tunnel ram.

YES! your info is very helpful. Please feel free to give me more pointers. I'll get back to you Fri or Sat with some vacuum and timing numbers to try to shine some light on this. Again, thanks for the reply!

Also- I have in my possesion: two accelerator pump cam kits and also two 50cc diaphram conversion kits that I have picked up.