Olds Scott

I am ditching the road draft tube for a PCV valve. I am making a aluminum plate to bolt up to the crankcase baffle but need to know what valve to buy for the 324 engine with stock 4 barrel. Also can I run a T-fitting off the back of the carburetor for the valve and power brakes or do I need a separate carb base plate for the PCV valve?

Tedd Thompson

When I tried that there wasn't enough vacuum to supply the brakes that is if you are using the large vacuum port at the back of the carb .The treadle-vac is a little weird about low vacuum. Does your road draft tube smell or smoke If not the old system will work well as it was built....Tedd

Olds Scott

Thanks for the information Tedd, I want to run the treadle-vac and did not consider that problem. I guess an additional base plate with vacuum port would still affect the Treadle-Vac system.

Tedd Thompson

Ya, I thought it was a good idea until I tried the brakes, wasted a couple hours making everything fit then had to put it all back as original. but I have had no problems with it since mostly because my engine is fresh with a new rebuild. I have seen worn 394's that would smog you out at a stop light they smoked so much......Tedd