Distributor/Carburator Woes

[boilermaster]

dawson357,
with what you have going on, you have no idea what vacuum you are going to have @ idle.
if your transfer slots are a little over exposed now and you correct that, you will end up leaner @ idle
You will probably then have less vacuum @ idle (will throw your PV calculation off).
1+ on the secondary (adjustable with a single adjustment screw) tune for no noise (lean bog) when the secondary's open.

 

[351mach1]

I have a Holley 600CFM Street Avenger on my "H" code 351 with a RV cam. I installed the Holley quick change vacuum secondary spring kit. Changing the secondary spring was a big help in eliminating the hesitation when accelerating.

Did you use heavier or lighter spring?

 

[boilermaster]

Fella's
No spring change required, just a screw to turn.
check out QFT-63-1 @ summit or Jegs.