Engine Serial Number Decode and Crankcase Ventilation
I appreciate all the knowledge and insight you've shared...not to mention the time spent.
Glad to help out.
interested in modifying this little one barrel to accept the PCV connection, fire it up, and call it a day. Do you think you could guide me through that? I'm a dentist by trade, so careful detailed work is kinda my thing.
Well, then yeah, you'll have no trouble with precision drilling! Compared to toothwork, this'll be a cinch. Here's what to do:
Fetch one of
these. Neatly cut off the flare—just the flare, taking away only minimal tube (a little tubing cutter is best, but do what you must) and remove the flare nut. Now you have a nice little elbow with a hose retention bulge at one end.
Obtain a correct carburetor base gasket. You will note there's a 1/4" hole in it adjacent to the outboard carb mounting bolt hole, next to the throttle bore. You'll find a matching 1/4" hole in the carb mounting pad on the intake manifold. Temporarily attach the gasket in its correct orientation to the bottom of the throttle body. There will be solid aluminum (throttle body) visible through that 1/4" hole. You will be drilling here.
Look at the left front corner of the throttle body, facing just about exactly the same direction as that aluminum carb ID tag. You'll find an arch-shaped boss. You will be drilling that boss to accept the straight (no bulge) end of the elbow, aiming for a fit that can readily be sealed with a smear of JB Weld or similar on the shank of the elbow before its insertion.
The trick here is to make these two new holes intersect neatly, without leaving an obstruction, and (this is the don't-or-die part) without breaking through into the throttle bore or the top surface of the throttle body.
Clean out the chips thoroughly—this shouldn't be an issue as you'll surely be cleaning and rebuilding the entire carburetor since you've already taken it off and apart. Install the elbow so it exits the throttle body and makes a turn toward the passenger side of the car.
Once the JB-Weld has cured, install the cleaned and built-up carb. Use oilproof hose (crankcase vent hose or fuel line hose) to connect the PCV valve to the new fitting on the carburetor. Use a hose clamp if necessary for secure retention.
While you're at it, never a bad time to do the
fuel line mod.