Installing an automatic trans in my 4spd truck, where would be the best vacuum port?

[rocketwheels]

I realize I need a vacuum line for the modulator valve (got a turbo 350 going in). Where would be the best place to draw the vacuum from? The truck has a centerbolt head 350 from the 90's , has an Edlebrock alum intake and also 4bbl. Truck has added power brakes. Truck is a 68 K-10.

Could I add an extra stubb where the power brakes draw from? Or should it be somewhere else. I know how the modulator works, but never really thought about how the vacuum works in different places on the engine.

As a side note, planning on using a Lokar or like style of shifter and keeping the simple steering column. I have the different drive shaft and crossmember that matches the trans. '68 = no backup lights so not worried about neutral safety switch.

Anything I'm not thinking of?

[LONGHAIR]

Originally Posted by rocketwheels

I know how the modulator works, but never really thought about how the vacuum works in different places on the engine.

As long as you don't put it on the "ported vacuum" fitting, which is intended for the advance cannister, you can use any place that you can find. Vacuum is the same everywhere, you can't "use it up"...

[57larry]

use the intake manifold