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Old 02-08-2011, 07:42 PM
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68RamII 68RamII is offline
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Default Blocking the Heat Riser??

Hey Everyone,

I have heard that it is probably best to block the heat riser hole going from the cylinder head up through the intake manifold. This should minimize the amount of heat on the intake manifold and stop the paint from burning off.

Do you guys think this is the way to go? If yes, what is the best way to do this?? I have a few ideas but I thought I would ask first.

Thanks

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John R. Zerucha
1968 GTO RA II Convertible
Sorry..The race car is Buick Powered
70 Skylark @2800 lbs
8.78 @ 153 mph 535 Stage 4 2850 lbs
8.97 @ 149 mph 523 Stage 4
9.36 @ 143 mph 464 Stage 2
9.77 @ 135 mph 464 Stage 1
88 Hawk @2355 lbs
8.06 @ 167 mph 535 Stage 4
7.90 @ 171 mph 572 Stage 4
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Old 02-08-2011, 08:29 PM
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nh68gto nh68gto is offline
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Default

Lots of reading and opinions on this in the Street section. Goods and bad.

Is it a daily driver or should I say driven in hot and cold or cooler weather?
Drag car?

To do it right heads have to be filled, or can get block off in gaskets. But usually burn through.

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Old 02-08-2011, 09:52 PM
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68RamII 68RamII is offline
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Dominik,

This is a car that will rarely be driven. So I am more concerned about keeping the painted intake looking good.

Thanks

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John R. Zerucha
1968 GTO RA II Convertible
Sorry..The race car is Buick Powered
70 Skylark @2800 lbs
8.78 @ 153 mph 535 Stage 4 2850 lbs
8.97 @ 149 mph 523 Stage 4
9.36 @ 143 mph 464 Stage 2
9.77 @ 135 mph 464 Stage 1
88 Hawk @2355 lbs
8.06 @ 167 mph 535 Stage 4
7.90 @ 171 mph 572 Stage 4
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Old 02-08-2011, 10:43 PM
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my69gto my69gto is offline
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Years ago I made blockoffs out of stainless steel flashing and inserted them between the head and the intake gasket. I made them slightly larger than the gasket opening and used a little permatex around the edges on both sides for additional sealing. Ran it like that for several years and never had a leak and it didn't burn through.

Dave

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