I have installed the Sniper 2 barrel on my 83 with about 3k miles logged on it. After much smoothing/tuning of the learned map and a fresh set of spark plugs from the learn mode being too rich the truck runs great! I run a innovate gauge in the other exhaust to monitor both banks AFR.
Installation was a cake walk, used a carb spacer to get the clearance for the air filter and used all the OE hard lines.
Holley was not an easy company to work with because they sent me a master kit that was less than a master. But since they have been great, my inline fuel pump gave up while I was in New Mexico and the 2 day shipped me a new one no questions.