Will a 600 vac sec carb work on stock 289? FIRE!!!!

Yea, a 600 is perfect. You can tailor the secondaries to open sooner or later, depending on engine demands. The secondary spring they come with is a little stiff for it. A lighter spring will let the secondaries come on faster.

600 Carb

The 600 CFM Vac secindary carb is perfect. One reason I like the Holleys is that they are tuneable. I had that carb on a few cars, from Chepie, which was a stocker, to the DCVER, which had a healthy 289. In both cases, once I got the carb set right, they were great.

If your motor is stock, you will probably end up dropping primary jet sizes. If my memory is correct, the carbs arrive new ith a primary jet size around 65. In Chepie, I ended up around 60 (maybe 59), using the exhaust pipe color, exhaust smell, mileage, and driveability as my tuning indicators. I also got the spring pak for the secondaries, and ended up with a softer spring to bring the secondaries in quicker, as well as fooling around with the accel pump. The Power valve should be fine as is.

Lots of infor here on the forums, just ask!:SNSign:

MIght look at the holley 570 street avenger too..

D.Hearne said:

Yea, a 600 is perfect. You can tailor the secondaries to open sooner or later, depending on engine demands. The secondary spring they come with is a little stiff for it. A lighter spring will let the secondaries come on faster.

Click to expand...

Ditto.

She may run a little on the rich side with jets supplied by Holley.

This is the carb I run on my street 'stang.

HistoricMustang
www.historicmustang.com/tech.html

I ran a 600 holley vs on my 289 mild engine/stock heads w/ same wieand intake for years. it did a great job and never needed adjusting, finally replaced it w/ a 4150 600 dp as I have a 4sp and it works great to.