1970 383 HP Intake question

I only see the casting number on the 70 intake. I think there is a mistake with part number on the 4 hole. They do not have the same part number. Regular 4 bbl intakes for 70 are a different part number then HP intakes.

Doug,

There are two photos of the E-Bay manifold. The second photo shows the casting number pretty plain. I missed the second photo the first time I looked.

Frank

Very odd indeed. Never seen 2 different parts with same part number.

yeah, Im interested to find out why and what...LOL I wonder if it could be a N95 thing or not? Something for emmisiions, etc???...

It is odd, maybe production date early had 4 hole, later had the 2 oval openings?
My friend with a '70 383 'cuda just had his carb off and it was the 666 casting with 4 holes. I have 2 666 casting off motors with two oval openings, I should check the dates, might be 71's.

FWIW...My original bought as new by my Dad 70 Road Runner(built in 8-69) has the 666 intake and it has the oval shaped carb pad.

maybe they just superceeded the number?????

If I am am not mistaken,they changed carbs halfway through 70.On my 70, 383,roadrunners at least.Depending on your build date ,either carter or holly.Maybe thats it???

I just bought (2) 666 manifolds. The first is a 666-1 (with oval holes) that I bought from Carlisle this year. Then I got lazy and bought a complete 666-2 with Holley carb and choke thermostat from the swap meet here on Moparts. This one supposedly came off a '71 car.

perhaps thats the difference??? The dash number?

My March 70 LA Built Road Runner 383-4 has the 666 manifold with 2 elongated slots versus 4 holes....

I seem to remember the 1968-9 383 intake had the four holes. I'm thinking it is a very early 1970 intake. I have one with the oval slots (buried in my pile of parts somewhere). I can't claim to be an expert on BB engines though.

I'd be curious as to the casting date on that , as far as the 383 4 bbl having 2 different intakes , one for HP and one for the non HP 5hp lower rating , I'd like to see that in a parts catolog please , on a page with a 1970 date please .

That manifold has the lowered choke thermo housing so a holley would also bolt on to it .

I have a 666-2 with the 4 holes sitting in my basement. How do you know the date? There is some kind of code on the bottom that reads 10 X 29

Remember that the number you see on the intake is a casting number, not a part number. Perhaps they were both the same casting and machined different and got a different part number in the parts book?

Also 666 cast in large letters on the bottom of the intake.