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I'm in the process of pulling off an old EFI system and going back to a carburetor.  From my many years in the classic Ford hobby, I just happen to have a Holley Street Avenger carburetor sitting in my garage.  For some reason I was thinking it was a 600 or 650, but decoding the numbers tells me it's actually a 570cfm.  I'm thinking it would be a bad choice for the 351 in a Pantera.  Any thoughts here?

Also, the car came with an aluminum carburetor manifold, but I have no clue what brand or model it is.  The only numbers on it are the firing order on top and the cylinder number on each intake runner.

Without knowing the brand or model, am I really costing myself performance?  Everyone likes to save money, but I'd rather use the right combination of parts for the car, even if that means buying something else.


Last edited by thegreatjustino
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As far as the size of the carb, it depends on what you expect from your Pantera. Yes, the 600 (or so) carb will be leaving some horsepower on the table. But if for instance the performance venue you have in mind is autocross, the 600 will be more throttle-responsive out of the corners and will (maybe) give 20 mpg on the street. Going to a 750 was once known for adding 30 horses and losing 4 mpg while living with a soft throttle response.

As far as the intake, guessing is hopeless. 50 years ago, there were some pretty good Cleveland intakes and a few truly awful ones and you should figure out what you have. Some were marked underneath with ids. The least expensive way to be sure is to install all your parts and drive it. If you're satisfied, the questions are all answered. The most expensive way is to assemble the parts and dyno-test your combination. Good luck-

If you use any of the carb calculators on the web, you will find the 351C specs out to something less than 650 CFMs.   If you plan to drive your car on the street, that is far more than enough.  That said, many will tell you to put a 750 on it because you will most certainly be running it wide open all the time generating maximum HP in stop and go traffic :-).  Sounds like you should install what you have and drive the car for a while.   A new manifold and carb will cost you $1500 at least.

Last edited by panterapatt

Dang, sometimes you get lucky.  If you guys read my introduction post about being the new owner of chassis 3820, I put a fair amount of history of the car there.  The longtime owner clearly took care of it as evidenced by the mountain of receipts that came with the car.  I guess it doesn't surprise me that he bought a high end manifold at some point over the 38 years he owned his Pantera.

Definitely a BT. The carb base has been worked perhaps on a flow bench.

If you go for a 750, you will need something more then a stock CJ camshaft otherwise you are wasting your time with it.

I find that a 4779 750cfm double pumper (with mechanical secondaries) works better then the generic 3310 with vacuum secondaries.

Both will give you the same top end power but the DP will give you better throttle response.

Actually I personally found the Edelbrock Torker more responsive then the BT. I felt that the BT was better for an automatic transmissioned car and the Torker better for a manual.

I'm not talking about ultimate horsepower, just throttle response.

The BT has 4 good flow ports and 4 that need flowbench work. Look inside that manifold at the runners. Do you see grinding marks? It looks like it has had work done to it.

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