Power brakes

['68OrangeSunshine]

Originally Posted by MikeB

I had to replace the power valve in my first Holley back in the 1990s. No backfire that I recall, but it all of a sudden would bog when trying to go up even a slight hill. No idea what caused the blow-out.

For years now the carbs have had some kind of check valve that prevent blow-outs. I've never even looked into how it works, but never had another blow-out.

The only old vehicle I have now is my 69 C10, and it has a very old Edelbrock #1406. It works just fine, but I'm thinking about an AVS2 just because.

I used to hafta keep a spare 8.5''Hg Power Valve in my glovebox. I guess they fixed that issue, but it was too late for me.

Sorry about the rabbit hole. I think I was trying to suggest Self Reliance to the OP.

The 1405 is what I think of as an equivalent to my Federal Mogul Carter AFB 9635S. I use the Edelbrock manual. Same as a 1406 but with manual choke. That's on a 350 in my '71 GMC Jimmy. [~600 CFM]
The 292 in the '68 Stepside has a 1404, manual choke but 500 CFM.