The Howards cam that I'm looking at would gain low & mid-range torque and MPG.
.3 higher DCR & 12* less overlap. I plan to use my 1.6 rockers for .528/.534 lift
I will loose some HP above 5400 RPM.
The Edelbrock 3500 has only a small control panel that stays attached. It lets me control timing & mixture as cells every 1000 RPM & 3 vacuum ranges. No PC port.
Has storage for 3 data sets, I use 1 for power settings, & 1 for lean mixture.
Unit shows about 4" of vacuum with key on & motor off, due to altitude.
I have an O2 sensor in each side. Passenger is used by 3500 & it displays red/green LED real-time. Drivers side has a seperate gauge that I monitor. They generally agree with each other.
Dizzy is special for & controlled by 3500
As I have low vacuum, I put on a hydroboost brake unit rebuilt from Astro van.
I spent lots of TLC setting up the 12 bolt gears & it's dead quiet. I would hate to tear it down. Next rear tires will be taller so as to turn less RPM on highway.
In OD my gear ratio is 3.56 I usually leave it in Auto mode & it acts like a 4 speed auto.