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There will be lighter covered areas on the block where the exhaust manifolds get in the way of the spraying paint.

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I usually have them ceramic coated and then bolt on and shoot the engine.
This last set were powder coated silver/gray bolted on and shot.
Like Scott said whatever burns off burns off, why over complicate the process?
Ron

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For some people, it's part of the fun.

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YOU asked for "correct" and you got some good/accurate replies. There's no grey area ("currently perceived") about it. The way the facyory did it is well known and documented, doing it any other way is simply NOT correct.

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I undestand, agree, respect and appreciate all the information supplied. I realize most everything known is pretty solid at this point but new information surfaces still today. The orange small block cut off for instance. At one time it was thought that the fender black out was done with a cardboard template covering the engine compartment and sprayed afer the body was pnted, it is now understood that the black was sprayed first. Cars restored to what was thought to be crrect 15-20 years ago are now moched for being incorrect, but that was info available at that time. Not arguing any points above, just tryng to be as correct appearing and durable all at the same time. I am very analytical many times to a fault, but that is something I have to come to grips with.

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I undestand, agree, respect and appreciate all the information supplied. I realize most everything known is pretty solid at this point but new information surfaces still today. The orange small block cut off for instance. At one time it was thought that the fender black out was done with a cardboard template covering the engine compartment and sprayed afer the body was pnted, it is now understood that the black was sprayed first. Cars restored to what was thought to be crrect 15-20 years ago are now moched for being incorrect, but that was info available at that time. Not arguing any points above, just tryng to be as correct appearing and durable all at the same time. I am very analytical many times to a fault, but that is something I have to come to grips with.

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Oh make no mistake, I agree completely on the subject of details that we either have wrong, will be discovered later, or possibly never be discovered due to the passage of time and loss of untouched original reference examples or factory supportive documentation. However, when it comes to the paint coverage on 340 exhaust manifolds that you specifically asked about, you can bank on the current knowledge being accurate, that's an easy one! Respect back at you!


As far as the 71 340 engine color cutoff date, so far all we have to go by are surviving examples, I have yet to see a factory document which details the changeover date, hopefully someday it will surface, but I sort of doubt it ever will. Concerning my post on the subject elsewhere, that was my attempt to share/add to a rather recent discovery, but that discovery didn't really change the (yet unknown exact cutoff date) but rather tossed in a "Never say never" example of a car that received an orange engine way past the blue/orange changeover date simply due to an earlier built engine being installed LONG after it was intended due to some problem with the engine or inventory.