Holley 2 bbl. 350 or 500cfm (pic included)

I've got a couple Holley 2 bbls. but not sure what hey are.
I have a book that says;
350cfm has 1.375 throttle bores
500cfm has 1.69 throttle bores

The 2 I have, have 1.48 throttle bores. Both have 7508-1 on the choke horn.
I was told the one with the little red triangle was a 500 w/electric choke when I bought it.
The other I was told "might be" a 350 mech. choke. It was pulled off a Pinto motor.


Here are some pictures.
Let me know if you need more info.
Thanks in advance....

 

http://www.carburetion.com/CarbID/HolleyID.htm
best I know of for id purposes
and I found this, looks like you're not the first to wonder
http://www.mercurycougar.net/forums/showthread.php?t=6856

 

I saw that Mercurycouger.net when I did a Google search.

 

7448 350 cfm also has 1/4 thread on air cleaner stud.. 4412 is 500 cfm 5/16 thread air cleaner bolt..

 

both have 1/4" thread.

 

hey guys, sorry i missed this thread. i have an illustrated parts and spec book from holley. lists all holley carbs by #.. this # 7508 is universal replacement ford 61 to 74 ,221 cid to 429, all trans ( see kickdown linkage in pics) no cfm listed, but the throttle bores work out to 425 cfm or so..
i will be glad to help id any holley carbs...start a thread or pm me.
dave lewis