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Old 09-07-2003, 07:55 PM
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Couple of questions on my BBC

I ran the casting numbers and this is a Marine 454.

My first question is, on my exhaust manifolds each pipe is tapped and has tubing almost like brake line that all comes together into some kind of mechanism...does anyone have ANY idea what this is? I'd imagine I could remove it, but I'd have exhaust leaks.

Secondly, this truck was originally equipped with a 400 SBC. I seriously doubt that the guy who performed the swap, swapped the radiator...so do you think the radiator will be sufficient to cool the motor?

And lastly...(I'm not driving this vehicle, have multiple things that need fixed)...my temperature guage is not working...where might I find the temperature sender? I'd guess in one of the heads.

Thanks for all the help.

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Old 09-07-2003, 08:14 PM
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Your exhaust manifolds could be the marine version. If they are, they are water cooled.

Vince
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Old 09-08-2003, 07:39 AM
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shameless bump for more input

Thanks BTW about the water cooled info.
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Old 09-08-2003, 10:25 AM
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I dont think you have marine manifolds first off they wouldnt fit in the truck. You probably are talking about the air injection. You can remove it, but you will need to plug the holes.

John
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Old 09-08-2003, 10:48 AM
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forgive me for my ignorance, but what is air injection all about?
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Old 09-08-2003, 11:04 AM
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Air injection is a pollution control device. It injects air into your exhaust to "burn" off the unburned fuel, thus lowering your emmisions.
In addition I am doing a similar conversion, my truck had a small block 400 and I am putting in a big block. The radiator in the truck that I pulled the bb from had the same radiator as the truck with the sb. If the radiator is in good shape it should be fine.

John
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Old 09-08-2003, 11:29 AM
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Ok, I don't think it's air injection.
Where did you get the motor? Was it fresh out of a boat?
The lines going into the headers from a boat app are for water to flow into them. They act as muffler, and if you ever see a boat with headers out the top, you will notice the water shooting out of them. They usually run upwards to go over the hull, so I don't think they are going to work for your truck.
As for the sender, there should be one head, but there's also a couple on the intake manifold. I like to use the one next to the t-stat.
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Old 09-08-2003, 02:14 PM
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I didn't do the swap. I purchased the truck because it had a BBC 454 in it that I'd like to eventually put into my 1957 Truck.

I was looked in the glove compartment of the truck and I seen a little piece of paper taped to the inside that said something like
"Dealer Installed Options"

and it had 400 CID for the motor.

I looked at the motor casting numbers, and the information I got says that it's a 1988 Marine Inboard 454 with 310 horsepower. Manufactured in Tonawanda New York on February 14th...how fuggin romantic.

The truck is a 1977...so a swap must have occured.

Sorry for the dumb questions. I haven't worked on any cars really since I was in High School some 6 years ago. And the biggest project I undertook was putting a 360 in place of a 6 CYL in my friends truck...we had alot of assistance from the teacher, telling us what we needed to get from the junkyard and whatnot.


I'll take some pictures of this weird arrangement tonight and post them to my album for everyone to tell me what they really are.
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Old 09-08-2003, 05:05 PM
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pictures posted

Pictures for your review...

http://hotrodders.com/gallery/showga...hp?ppuser=8293
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Old 09-08-2003, 10:24 PM
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Looks like I was wrong....sorry.
Those aren't the headers that I was thinking about. If you want to take it off, just plug it up. You should be able to get them at your local parts store. Then you won't have any leaks. And don't worry, cuz these aren't dumb questions....
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