let me set the story , my fish 340 is fresh , with 4v alum intake . the rest is stock 1970 spec. now to the 390,1960 tbird the cam is 256/256 .spec per shop
the modern vacuum cans sold everywhere don't work well , Smooth driving. so I chucked it for the nos 12370 factory piece. I Add a few washers to increase
the spring tension , total vac is controlled by a tube in center of spring to limit travel. At 650 rpm 390 has ZERO pull on vacuum can. at 675 it has 1/2 of a
Degree pull,. and is linear al the way to 1200 rpm. AND Steady. carb it the autolite 4100. and does well . ign is Jacobs and hidden.
Now how come I can't repeat this on my 340 Plymouth it has carter afb . stock manafolds with direct connection ignition conversion.
With The vacuum can hooked up it pops and cracks at all speeds? I dis connect and its two barrel smooth. Does Ford (in 1960 Know ) something
that Chrysler didn't??? Should I get the 50's vac piece? Okay , I give , who is really smart, OR are they still alive??
any input i'd like to hear.
ayrwoof@aol.com
