hmm i might be thinking of the pre 2000 heads

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

"Upgrade yor 3100 or 3400 engine with this 3500 "top swap" conversion. This kit comes with everything you need for the job including the 3500 cylinder heads (with options for our Stage 1 and Stage 2 portwork and valvetrain), ported 3500 lower intake, ported 3400 upper intake (or newer 3100 large port upper intake), and all the AC Delco gaskets and parts you need for the job."

This is from mms.com , the reason for my question was to see if I read it right cause if so I can get parts and p&p for cheaper.

i would just port your exicsting heads. unless you want to bore out your 3100 by .020 you can not use 3500 heads.

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

Ok so I talked to Mike Miller from MMS.com and he said, "I just sold a Stage 2 3500 top swap to a guy with a 3100 along with some 3500 headgaskets so everything will fit right. I can't say that it's optimal, but it will fit."

So here is what i am looking for, an SE has 175 stock hp and a GT has 200 stock hp. I am looking to equal a GT/200hp so what would get me there?

Nevermind I found the setup that will get me where I want to be.

why are you against a 3800 swap?

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'05 WRX STi- AP Stage 2 tune|Invidia DP|3" Borla XR-1 CBE|TiC super shifter set|DBA 4000 rotors/SS lines|Lots of braces/poly bushings
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

not sure if theyre still in business but mantapart.com sells some stuff. i used them when i had an olds achieva 3.1 (achievalowspeed)

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ALL GO, LITTLE SHOW

• 2004 Comp G - Modded Like A Mofo And Hibernating

• 1988 VW Jetta - Slammed Slow And Reliable

• 1994 Cadillac Eldorado ETC - Sold

Manta Part is still in business but ordering is kind of a PITA. They have mass amounts of J- and N-Body stuff.

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bigger by 3mm i believe.

the way everyone is talking it sounds like the best idea might be to get a 3400 and bore/port/polish it and add the 3500 uim,lim,and heads. (ported and polished of course) but if you were to do all of that it might be cheaper to squeeze a 3800 in there.