Ho, that is a good one ! Thanks

 

Kenneth - I suspected the same (and considered mentioning it) but wasn't certain regarding the float assembly on that 7043250.

 

The 7041250 spec are .070 jets, 49B pri rod and AS sec rod
The 7043250 spec are .069 jets, 53C pri rod and CG sec rod
Note: the engine as non stock "J" heads so....
With some research, the 7041250 is closer for 455 eng, same jets and prim rod, sec rod is AS vs AK for original. (could change them if it's that bad).
I don't mind returning it to get the 7041250 for that and the missing port.
What do you think ?

Thanks

 

You're essentially asking if it's OK to exchange your 7043250 for the 7041250. I'll just note both carburetors were designed for the 350 cid engine. You have a 455 cid engine. I don't have the knowledge to suggest usage of 455 cid jets & rods for either of those 350 cid carburetors. I'd not have a problem suggesting the opposite - using a 455 cid carburetor on a 350 cid engine though - I just don't have the experience. Sorry.

EDIT: And, I suppose, my quandary exists in me not knowing whether the idle circuit is the same which may make a difference.

 

 

Ok, thank you for your honesty, if someone can confirm that it's a no-no, I'll just return it, and keep searching for the good one.
Can you believe the current carb on the 455 is from a 1980 Buick rivera V6 and the fuel bowl empties in 24 hours after stopping the engine !!
I can have one from I-5automotive but $$$, the price just rise from 425$ to 592$, I'm in canada so it's a 113$ more for shipping + exchange !!
It's my friend's car, so his decision, but I need to give him some option soon.
I can probably find a used one on ebay and rebuild it.. will see

Thanks again

 

Wow that was a good one thanks !
Makes me think the right way I think !