Sbc help!?!?

Got 67 sb casting num 3896944 intake nums 3905393. Need help figuring out what goes in the 1 1/4"
Hole on the rear of block next to distributor. Any help would be appreciated, thanks.


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Road draft tube.

 

^^^^^^^^^^^^^^^^^

 

........ and make sure you have the baffle/canister under the intake.

 

On the 55 thru 62 engines that was where the road draft tube attached. on the 63 up that's where the adaptor for the PCV attached.

 

if your valve covers already have the oil fill/pcv you can just put a freeze plug in it. Smooth covers with front fill/road draft is more traditional though

 

Thanks fellas much appreciated, got her this far.


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And if you run no hole Corvette finned valve covers you will by default have a Vette SBC!

 

Or a soft plug or a grommet and pcv valve.

 

There also is a breather "can" inside the block that has to be there to work with the draft tube or it will dump oil out the tube.