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351m intake front air injection question

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The Torino Kid View Drop Down
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    Posted: 30-September-2018 at 10:57PM
So I got an intake manifold that I've been looking for and the only thing wrong with it. It has has a dime sized hole underneath the intake where the air injection crossover connects from one side to the other. I am not using air injection so my question is "would welding it closed be advisable since it's exposed to the lifter valley and oil?"
Second question is "should I block off those air injection ports in the head with some thin sheet metal or high temp jb weld? Tia
1973 Gran Torino Sport CJ 351

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Rockatansky View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 01-October-2018 at 7:28AM
what heads?

are the passages open and functional through the heads even though you're not using the system?

do you have the heads that have tapped holes in the front back that take the plugs to close them off?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 01-October-2018 at 11:40AM
It's probably a good idea to fix that hole in the intake. I don't think you have to block off the head passageways but if they are threaded it'd be a quick and easy fix.
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 01-October-2018 at 2:09PM
the Thermactor / EGR / A.I.R. / whatever you want to call them / passages in the front intake face of the smog heads are irregular shape, like the coolant passages in Windsor heads IIRC

a pic of the heads would help generate the best answer
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Rockatansky View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 01-October-2018 at 2:15PM
BTW there are turkey pan gaskets for each,


with & w/o the passage, would the blocked off turkey pan solve the problem?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote The Torino Kid Quote  Post ReplyReply Direct Link To This Post Posted: 02-October-2018 at 1:02PM
Originally posted by Rockatansky Rockatansky wrote:

what heads?

are the passages open and functional through the heads even though you're not using the system?

do you have the heads that have tapped holes in the front back that take the plugs to close them off?
the heads are 351M so they have the extra holes for smog.
1973 Gran Torino Sport CJ 351

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Post Options Post Options   Thanks (0) Thanks(0)   Quote The Torino Kid Quote  Post ReplyReply Direct Link To This Post Posted: 02-October-2018 at 1:11PM
I'm getting the intake repaired at the machine shop as I type this.so hopefully I'll get it back by Fri.
1973 Gran Torino Sport CJ 351

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 02-October-2018 at 2:50PM
you may still need the gasket with the passage holes to seal the heads ;)



Edited by Rockatansky - 02-October-2018 at 2:51PM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 02-October-2018 at 3:09PM
i'm curious as to why it had a hole in the bottom side in the oil galley???
JOHN
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