My apologies to Kevin for totally derailing his disc brake thread and turning it into a discussion on big block exhaust manifolds. I'll move that part of the discussion in that thread to this thread.
No, the big block Chevelles didn't have a special manifold for the solid lifter big blocks, crazy as it seems. Only the B bodies used a special manifold for the solid lifters and on top of that, only on the 65 B body L78 and the 66 B body L72.
__________________
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Bruce, you do know that B body and A body manifolds don't interchange?
No, I didn't know that. But thinking of it, the one I'm thinking of selling I think is a Corvette casting #. It is straight at the bottom, the 66 425HP has a curve at the bottom (I have a set of the correct ex mans) That makes sense them being different....
THX
4SPEED427 said
December 13th
Here is what the l72 66 Canadian Pontiac and any 66 Chevrolet L72 B body would have used.
Those are the hard to get exhaust manifolds, 827/828 without emissions holes. I have the same set" with" the holes. The one above on the right is for the drivers side, I have one but it goes straight at the bottom. I believe it was used on the Corvettes.
4SPEED427 said
December 14th
The Corvette manifolds and the 66 B body L72 manifolds are identical.
Dorman reproduces these manifolds. They come with the holes for smog pumps so you have to plug them.
65 SD L79 said
December 14th
I bought a set of the Dorman ones for my GP L72 clone car
4SPEED427 said
December 14th
I had bought a set for my Strato Chief 427 conversion but then I found originals so the Dormans went back. But I had no complaints about the Dorman pieces, they looked great and it seems to me the price wasn't all that bad on them.
65 SD L79 said
December 14th
All good except for smog holes . I will plug them , grind heads flush and have them ceramic coated
4SPEED427 said
December 14th
65 SD L79 wrote:
All good except for smog holes . I will plug them , grind heads flush and have them ceramic coated
Do they have a ceramic coat that looks like cast iron?
LT1Caddy said
December 14th
4SPEED427 wrote:
The Corvette manifolds and the 66 B body L72 manifolds are identical.
Dorman reproduces these manifolds. They come with the holes for smog pumps so you have to plug them.
The left side is different for the Vette...3994045
4SPEED427 said
December 14th
I'm not sure where you found that but 3994045 is not a Corvette manifold that I can find. All my books say the 66 L72 B body left manifold is the same as big block Corvettes.
4SPEED427 said
December 14th
I show 3994045 as fitting Impala/Caprice and pickup trucks.
65 SD L79 said
December 14th
4SPEED427 wrote:
65 SD L79 wrote:
All good except for smog holes . I will plug them , grind heads flush and have them ceramic coated
Do they have a ceramic coat that looks like cast iron?
Yepper
LT1Caddy said
December 14th
4SPEED427 wrote:
I show 3994045 as fitting Impala/Caprice and pickup trucks.
I bought them from a Corvette guy, so I jumped to that conclusion that he said they were off a 74-75. I never checked the # to GM parts, but it seems they will fit some Chevelles and for sure the B body 65-65 cars. There is no "turn down" on the bottom, makes it a little difficult to install the oil filter.
If someone needs one or the pair, I have them.
65 SD L79 said
December 14th
65 SD L79 wrote:
4SPEED427 wrote:
65 SD L79 wrote:
All good except for smog holes . I will plug them , grind heads flush and have them ceramic coated
Do they have a ceramic coat that looks like cast iron?
My apologies to Kevin for totally derailing his disc brake thread and turning it into a discussion on big block exhaust manifolds. I'll move that part of the discussion in that thread to this thread.
The L78 manifold is the same as the 325 horse manifold unless I've missed something?
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
are they not the same as L72 ones like on the B body? I will have to get out the books
No, the big block Chevelles didn't have a special manifold for the solid lifter big blocks, crazy as it seems. Only the B bodies used a special manifold for the solid lifters and on top of that, only on the 65 B body L78 and the 66 B body L72.
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Kevin.. I may have a left side BB manifold for sale this winter. I think I'm going to install my headers
-- Edited by LT1Caddy on Wednesday 13th of December 2023 08:34:20 PM
Bruce, you do know that B body and A body manifolds don't interchange?
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
No, I didn't know that. But thinking of it, the one I'm thinking of selling I think is a Corvette casting #. It is straight at the bottom, the 66 425HP has a curve at the bottom (I have a set of the correct ex mans) That makes sense them being different....
THX
Here is what the l72 66 Canadian Pontiac and any 66 Chevrolet L72 B body would have used.
Those are the hard to get exhaust manifolds, 827/828 without emissions holes. I have the same set" with" the holes. The one above on the right is for the drivers side, I have one but it goes straight at the bottom. I believe it was used on the Corvettes.
Dorman reproduces these manifolds. They come with the holes for smog pumps so you have to plug them.
I bought a set of the Dorman ones for my GP L72 clone car
I had bought a set for my Strato Chief 427 conversion but then I found originals so the Dormans went back. But I had no complaints about the Dorman pieces, they looked great and it seems to me the price wasn't all that bad on them.
All good except for smog holes . I will plug them , grind heads flush and have them ceramic coated
Do they have a ceramic coat that looks like cast iron?
The left side is different for the Vette...3994045
I show 3994045 as fitting Impala/Caprice and pickup trucks.
Yepper
I bought them from a Corvette guy, so I jumped to that conclusion that he said they were off a 74-75. I never checked the # to GM parts, but it seems they will fit some Chevelles and for sure the B body 65-65 cars. There is no "turn down" on the bottom, makes it a little difficult to install the oil filter.
If someone needs one or the pair, I have them.
These are perfect. gorilla coatings in Barrie ON. His daughter lives a few miles from me so he picks up and delivers
This is my NOS set of 827 828 manifolds
Kevin.... ease up on the polish....LOL NICE (on the shiny parts, not the NOS parts)
-- Edited by LT1Caddy on Thursday 14th of December 2023 07:52:19 PM
Ya those L79s have a lot of bling
Those are for the L72 Grande Parisienne?
I am going to use the Dormans on the Grande and the NOS on the Impala
I am itching so bad to see that L72 Grande Parisienne project. The only thing better would be to find one of the originals!
Unfortunately like so many others here the body shop it is in has taken my money and not working on the car