Exhaust manifold question
 

Does anyone know what these fit? I assume 67-72.Are they aftermarket or GM?

Re: Exhaust manifold question
 

SBC...probably a 327ci or 350ci motor.

Re: Exhaust manifold question
 

I may have found the answer on the Dorman exhaust site. Can some one confirm this is a 69-72 NOS exhaust manifold?

Re: Exhaust manifold question
 

I wouldn't say NOS. NOS means NEW (old stock). The part in the pic looks used. However, it looks exactly like the ram horn that's on my '69 (a short water pump 350ci). The outlet is the correct curved version. And it doesn't have an accessory bracket, both good signs that it's what you want. The 'Vette ram horns have a straight (larger) outlet. And some of the earlier ram horns have accessory brackets cast into them. Later ones had ports for the AIR injection system.

I don't have a parts lookup or a casting number book with me right now. So someone else will have to look that up for you. But by sheer looks alone, it appears to be correct.

Re: Exhaust manifold question
 

I find it odd that GM isn't stamped on it.
My '68 manifold has the assy bracket but, other than that, you will notice
dimples near the bolt holes and the GM logo stamping.

Re: Exhaust manifold question
 

I will look at my 69 tonight. I said NOS because if you see it in person it appears to never have been on a vehicle. I also have this one which is definately aftermarket.

Re: Exhaust manifold question
 

It might be a repop. I think the 'rams' look a little too smooth and fluid. The originals were very rough castings with casting marks pretty evident. I don't know for sure though.
Shawn

Re: Exhaust manifold question
 

I also got these and have no clue what they are from?

Re: Exhaust manifold question
 

There's one little detail in this picture that makes me sure it's aftermarket...

http://www.67-72chevytrucks.com/vboa...1&d=1274818371

Re: Exhaust manifold question
 

That's the extra one he has that he knows is repop. I did the same thing, but deleted the post when I realized he said it was a repop he also had.
Shawn

Re: Exhaust manifold question
 

lol.....

Where;):D

Re: Exhaust manifold question
 

:lol: I agree!! Al W.

Re: Exhaust manifold question
 

I know that one is Kev but what about the other with a GM part number.

Re: Exhaust manifold question
 

At one point, GM switched from mounting the belt accessories to the manifolds to mounting them to the bosses in the heads. I think this change took place in the late 60's. I'll look it up in my books at home to give you the exact date. But I think the ones in the 2nd pic are from a much older SBC car (or truck?). It also appears that you have a spacer on the top manifold (2nd pic) which is for the valve that would close when the engine was cold. Often times these valves seize up and are replaced with a spacer. (Can't tell if yours is only a spacer or a hollowed-out valve)

For a 69+ truck, I would say no to the 2nd pic for sure. I know by '69 those accessory mounts were all but gone on the manifold except for MAYBE the 'Vette, and even that I'm not sure without my book.

Re: Exhaust manifold question
 

I was just fooling around. Thankfully it's on the inboard side of the unit though. I don't believe I could stomach seeing the word "China" on the side of my engine every time I opened the hood.

Re: Exhaust manifold question
 

I can't tell if it's a proper number for 69-72 trucks, but it will work great regardless of the number.

Re: Exhaust manifold question
 

I bought a couple of trucks and a bunch of parts and these were included. I am probably going to sell them and did not want to misrepresent the item. What do you think is a fair price if we consider them both repops?

Re: Exhaust manifold question
 

You can research them through Summit. They sell Dorman aftermarket manifolds for these old trucks. That would give you a new price so you can figure what your price would be from there.

Re: Exhaust manifold question
 

For a pair from Summitt to your door would be about $250. I was wondering what I could possibly get for them on the parts board? I know everyone here is cheap.:lol:

Re: Exhaust manifold question
 

:lol:

Re: Exhaust manifold question
 

I just checked my book from the first set of pics. 3932469 maps to LH 69-70 350,400ci small block, passenger car, no AIR. Dipstick indent is the little valley next to the "695" number, so this would have also been a driver's side dipstick car.

They will work correctly on a truck since trucks 67-72 need a curved dump for best fit. They should have a GM logo, so need first pics are repops. And we all know what the ones from China are all about.