[dirtrocker]

Back in the early days did new 400s come with shim head gaskets?

Curious why, to my knowledge, noone makes them?

From my research, for the street, all thats available is in the .039+ range

 

[DOUG G]

To the best of my knowledge yes the did. Now they're over 20 years old and discontinued by GM but heard there is maybe a few pair left.

 

[DOUG G]

This is what I found at Summit, kind of pricey...

FOG-900134175 Flatout Gaskets Copper Cylinder Head Gaskets
Head Gaskets, Rubber Coated Copper, 4.175 in. Bore, .031 in. Compressed Thickness, Chevy, Small Block, Pair $98.95 at www.summitracing.com

 

[dirtrocker]

I didn't think those would be too good a street application? Am I wrong?

I'm in the unfortunate position of having a fresh 400 shortblock with full dish rebuilder pistons (+.040 in the hole).

With FP blue gaskets and vortec heads I should be right at 9.01:1

Trying to make my final decision as to which cam to stick in it.

 

[GOSFAST]

I didn't think those would be too good a street application? Am I wrong?
I'm in the unfortunate position of having a fresh 400 shortblock with full dish rebuilder pistons (+.040 in the hole).
With FP blue gaskets and vortec heads I should be right at 9.1:1
Trying to make my final decision as to which cam to stick in it.

Hi Dirtrocker, try to avoid using "copper" on the street, if they're not installed properly, you'll end up with nothing but grief. I have probably a couple thousand individual head gaskets in stock from "old" inventory, mainly the "Victors". It'll take me to the middle of the coming week to get to the shop and then I'll get back to you. I know we use to carry them from G.M., when they were being supplied by "Victor". I'm not sure I have any left. Thanks, Gary in N.Y.
P.S. If possible send an e-mail to "[email protected]" Monday just as a reminder and I'll get back to you.

 

[dirtrocker]

Much appreciated!!

 

[bigjimzlll]

cometic can/will make you any thickness of gasket...quite spendy though.

 

[dirtrocker]

With the popularity of the 400 nowdays........why doesn't someone offer them?

Was there a problem with the shim gaskets sealing at the steam holes or something?

 

[Guest]

I used 4.00" motor Mr. Gasket, .020" thick, steel shim headgaskets on my 406 by reaching up inside and scribing the overhang and then very carefully, by hand, removed it using my 1/4" drill and a cheap stone and a fine file.

Worked fine!

pdq67

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[dirtrocker]

Thought I'd post a link to these as an example. At the time I didn't find any online ( although noted above ) info specific to them and didn't pursue it.

http://cgi.ebay.com/ebaymotors/New-...ryZ33617QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[Camaro_fever68]

Thought I'd post a link to these as an example. At the time I didn't find any online ( although noted above ) info specific to them and didn't pursue it.

http://cgi.ebay.com/ebaymotors/New-...ryZ33617QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

That is a good gasket. I've run them.

 

[Guest]

OK!!

What were they back then?? My $16.95/pr Mr. G. .020" thick steel 350 engine shims and my time trimming them??

pdq67

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