1979 Block Stamp Pad

[61 Silver]

Hi!

I very seldom visit the C-3 section of CAC but I am in need of information on a 1979 stamp pad. A friend just took a 1979 L-82 4-speed Vette in trade on a big block Camaro. I am knowledgeable on C-1 & C-2 pads, but clueless when it comes to a C-3. Would the information on the pad be in the same format as 1 & 2's. Vin number & F for Flint (except big blocks), assembly date and suffix. The 79 is for sale and I want to insure we provide the correct information.

Thanks for any help!

Ray

 

[JohnZ]

Similar format, the engine plant stamp for a '79 L-82 4-speed would be VxxxxZBA, with the x's being two digits for the month and two for the day of the month; block casting number would be 3970010. The Flint Engine prefix was "F" through 1966, and changed to "V" in 1967.

 

[61 Silver]

Thanks John

Ray

 

[craig32]

Ray,
Would your 270HP '61 be the dual four barrel set-up?
Craig

 

[61 Silver]

Hi! Craig

Yes it is the 270HP engine. This is a picture of the engine when I first purchased the car. I need to take a picture with a restored engine bay.

Ray

 

[craig32]

Ray,
That's what I have on another engine too. I bought the proper coil bracket for it, but I can't get it on due to the vacuum advance on the distributor. Is that 'progressive linkage'? Mine are connected at the bottom by a single rod, and footfeed connects to the front carb. Here's a question, maybe John Z can jump in here - Are the dual quad set-ups 'just for show'? I put them on a 67 270 HP 327, don't know if HP would be higher with more carburetion but I'm sure the cam would have raised it. Thanks all - nice cars, Ray!!
Craig

 

[JohnZ]

The linkage shown is the correct progressive linkage; if both carbs are tied together, fuel consumption will go WAY up. All of the 2x4 applications used the old-style dual-point distributors with no vacuum advance; that's why the design precludes the use of a vacuum-advance distributor with the stock coil/plug wire supports and top ignition shield. The WCFB's flow about 390CFM each, so there's almost 800 CFM available at wide-open throttle, which is far more than any 283 needs. I've had several 57's with 2x4's, and they run very nicely with the correct progressive linkage arrangement, and work best with AC R45S plugs - anything colder will experience some fouling around town, as the rear (primary) carb is jetted richer than the comparable 1x4 carb due to poor mixture distribution to the front four cylinders.