#2820953 - 03/23/14 07:23 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Over the Hill
Registered: 02/15/02
Posts: 1707
Loc: Massachusetts
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Summit Racing or Jegs if you're going new.
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'90 Mercury Grand Marquis GS 65mm TB, 67mm Lightning EGR, GT40 intake with a ported lower, X-pipe with mandrel bent exhaust, Flowmaster 40s, Marauder tips. stock 5.0, 123 rwhp and 239 rwtqNew drivetrain in the works. 
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#2824637 - 04/04/14 03:37 PM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Over the Hill
Registered: 02/15/02
Posts: 1707
Loc: Massachusetts
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What's the latest on your build?
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'90 Mercury Grand Marquis GS 65mm TB, 67mm Lightning EGR, GT40 intake with a ported lower, X-pipe with mandrel bent exhaust, Flowmaster 40s, Marauder tips. stock 5.0, 123 rwhp and 239 rwtqNew drivetrain in the works.
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#2828397 - 04/17/14 03:48 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 10/05/12
Posts: 297
Loc: Houston
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I thought i have found the heads but turns out someone up there hates me, i bought a pair of gt40 3 bar and it has all the goodies machined, stainless valves, dual springs, mild port work all was fine except the fact that someone has machined the rocker bolt hole from a 5/16 to a 7/16 and now i cant use my cobra rocker arms. by any chance that there's a thread reducer from a 7/16 down to the original 5/16   
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 Made in Canada
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#2828460 - 04/17/14 01:12 PM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 06/02/13
Posts: 103
Loc: Colorado/Chillinois
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You might be able to use helicoils, or find a good metal shop that can fill the hole, and redrill it out.
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1994 Crown Victoria(waiting to repair to sell)
266K and counting
2004 Crown Victoria P71
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#2829203 - 04/20/14 06:16 PM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 10/05/12
Posts: 297
Loc: Houston
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Will it be as strong due to the extra spring presure?
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#2836491 - 05/20/14 11:05 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 04/15/09
Posts: 143
Loc: johnsburg ny
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Alexs parts has a drop in spring kit,a nd more than likely the 7/16 is from a lightning they cam with two different varieties. Nothing wrong with a bigger stud lol
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building a nasty box....ask me about it sometime.
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#2836492 - 05/20/14 11:07 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 04/15/09
Posts: 143
Loc: johnsburg ny
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Whoever had it probably used screw in studs is my guess
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building a nasty box....ask me about it sometime.
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#2845934 - 07/01/14 12:48 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 10/05/12
Posts: 297
Loc: Houston
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Well I found a company that is called "timecerts" if I'm not mistaken, they have a solid reducer so I can use the cobra roller rocker arms on these heads. But in the mean time I will start a new thread about another topic here in the box forum hope some one can help.
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#2846630 - 07/04/14 07:59 PM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Over the Hill
Registered: 02/15/02
Posts: 1707
Loc: Massachusetts
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Keep us posted.
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'90 Mercury Grand Marquis GS 65mm TB, 67mm Lightning EGR, GT40 intake with a ported lower, X-pipe with mandrel bent exhaust, Flowmaster 40s, Marauder tips. stock 5.0, 123 rwhp and 239 rwtqNew drivetrain in the works.
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#2849622 - 07/21/14 12:56 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 10/05/12
Posts: 297
Loc: Houston
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 got them from pepboys they have a suprising stock of perfomance parts now if only they can price match with jegs and or summit it would be awesome, they were 63 bucks I'm thinking of getting the main caps as well you know to bolt down the two major stress points
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#2849899 - 07/22/14 11:44 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Climber
Registered: 01/17/07
Posts: 892
Loc: Joisey
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Funny you should mention the performance parts section of Pep Boys. I was there on Sunday (Union NJ store) and noticed the selection of performance parts. I began to wonder how many people actually buy those parts. In my area, I am one of the few people that does any kind of work on their cars.
Packman
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2005 Grand Marquis base model (analog dash and a cassette player *sigh*) Mods: SW long tubes, full 2.5" exhaust (cats and dynomax 17749 muffs), and K&N CAI
1986 Crown Vic Built 351W and AOD, BIG brake swap, 3.73R&P, etc....
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#2850123 - 07/23/14 11:04 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Member
Registered: 10/05/12
Posts: 297
Loc: Houston
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Yea not many people are diy performace junkies most people around here take it to a shop and slap a sticker on the back window and so on
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#2850445 - 07/24/14 09:49 AM
Re: Upgrading my GT40s
[Re: Monster_Addict]
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Climber
Registered: 01/17/07
Posts: 892
Loc: Joisey
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^^^^^  So True^^^^^ It's ironic that the people that do the work to their cars don't put stickers on their cars.
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2005 Grand Marquis base model (analog dash and a cassette player *sigh*) Mods: SW long tubes, full 2.5" exhaust (cats and dynomax 17749 muffs), and K&N CAI
1986 Crown Vic Built 351W and AOD, BIG brake swap, 3.73R&P, etc....
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#2850463 - 07/24/14 11:37 AM
Re: Upgrading my GT40s
[Re: Packman]
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Grand Poobah
Registered: 06/05/03
Posts: 11603
Loc: Holland,MI
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^^^^^ So True^^^^^ It's ironic that the people that do the work to their cars don't put stickers on their cars. Also true. I hate stickers on cars, but I've have a mini fridge in the garage covered in them...
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2006 MGM GS
1984 Colony Park
1979 Tudor
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