Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
And "maybe" adjust the power valve. I think the rule of thumb is to run a power valve that is half your idle vacuum....so you need 13" Hg vacuum. And yes, the 6.5 is stock.
There are two (at least!) competing theory as to power valve sizing. If you want to experiment, I suggest BIG swings to determine which direction works, for YOU. Highest available, (ten something, I don't know exactly) and a 3.5.
(A lot easier to test on a four barrel than a sixpack.)