Make sure all the holes, even the little ones, are sealed.




HVAC tape and a dab of silicone works well. You can probably make it prettier, but seal all the holes.

Or open the windows

Yes, except that opening the windows draws the fumes through the holes even faster.

My crankcase vent tube fell out of the block again. The header/extractor won't let me fit a stock tube there. Any ideas? Maybe an L-series right-angle block vent tube would work?

I can't help with your breather tubee DD, But I've often found that a buggered boot seal is a sure fire way to invite fumes into the car.

Could or basically any fitting that will fit the hole.

Could your tap the joke slightly? My l doesn't have a block breather just rocker cover one.

Is the solution to buy a new boot seal?

Here is one type of L-series breather tube, it fits behind the exhaust so it's hard to see. Just need to find one and try it, or if someone has one, measure the diameter.