It's late...very sorry to act like this to new friends here...just hate to be accused or implication of anything other than trying to find an answer eluding me nearly 20 years.

My H51 car did get a carter carb, the part number you supplied is my original carter carb.

The engine code is 086 - so the 3rd digit is a 6.
The carb code is 40 - so the 2nd digit is a 0.

Yes, this must explain what version, I've not been able to decipher the engine codes in line 4 on BCS.

May help prove the 335hp engine was optional on base BH/BP & JH/SE, something every Mopar mag and book neglects to inform or produce an example for our viewing pleasure and authentication in the hobby. I've seen a million 'Cuda's & R/Ts and no base model 383 cars that get exposure. If I've been rude and obnoxious, many apologies...