vmaxpwc

Hi Guys,

I have a stock good running L79 (327/350) in my 1966 convertible with 4spd and 3:36 rear gears. I have recently set the timing ie 36 degrees all in at 2800 and also replaced the points and put in a new vacuum can and installed the Crane X2000 module with RPM limit.

I was having some issues with the carb adjustment at idle and the secondaries were not opening and some leaks so I pulled the carb off and started the rebuild.

I would appreciate any comments on the following changes to stock.
Installed 68 jets (65 were stock) in the primary metering block. I replaced the secondary meeting plate with a block and installed 76 jets (I could not identify the plate that was in the carb a -6?) I used the dark red cam and put in a .28 (anti pull over)squirter (stock is .25). I found a steel ball in the vacuum secondary and a bad diaphragm. I plan to leave the ball out. I cannot find the correct diaphragm part number and I know there are several with different lengths.

Does anyone know the correct Holley part number of the vacuum diaphragm? I cannont find it anywhere.

I plan to use it with the long yellow spring and a quick change spring kit.

Could any of you with a L79 comment on the jetting/squirte setup for the carb? Is it too much? Its easier to change while its out of the car.

Thanks for the help.

Vmax

JohnZ

Leave the check ball in place - if you remove it, you'll get a huge BOG when the secondaries open (common mistake).

vmaxpwc

Thanks John,

My friend suggested I call the Holley tech line. They were great. I immeadiatly was in touch with Ricky and he confirmed that if the vacuum diaphragm has a place for a ball it needs to have a ball. If not no ball is needed as some assemblies did not have a place for a ball and used a restrictor. Also the diaphragm for the 3367 is a 135-4 and that has a 2.054 rod length.

Vmax