Installed the 3500 manifold

[Manitcor]

who knows, GM has been known for stranger things

[MidnightriderZ24]

i picked up the 3500 plenum for 80 bux on car-parts.com what i did was tell them that i could get a brand new 1 from GM for 120 and they dropped it!

[01monte]

SO what I am understanding from this, If I am to use the stock TB and Stock LIM on my 3400, all I need to use the 3500 plenum is a TB adapter and 3500 plenum gasket?? correct me if I am wrong....

[gboogie99]

beautiful...

[SappySE107]

Adapter, 3400 gaskets, vacuum line setup redone for the stock MAP or an adapter to use the 3500 MAP sensor. TB arm ground down to clear the fuel pressure regulator, either a bracket adapter for the DIS to plenum mounts or let it hang off the bottom 2, charcoal cannister purge mount changed or let it hang, and block off the 3500 IAC passage or tap/thread a nipple in there to use for a vacuum source.

Im still working on a kit to make this swap as simple as possible.

[xtremesunfire]

you cant even get it anymore at gmpartsdirect.com unless there is a different part number for it

[tejohnson]

you cant even get it anymore at gmpartsdirect.com unless there is a different part number for it

Interesting. It is like they removed it from the catalog. I had been waiting for mine for about two weeks since it was in a "Special Order" status. Mine should be delivered tomorrow.

[Mars]

Upshift at 7000 RPM? What else is done to your engine?

[tejohnson]

Maybe there was a part Number change? The UIM I got today has a different part number on the casting: 12598959

Looks like a 3500 plenum to me... Will post pictures soon.

[tejohnson]

Maybe there was a part Number change? The UIM I got today has a different part number on the casting: 12598959

Looks like a 3500 plenum to me...

I highlighted the new casting number with a sharpie in the last image:

[farmerz24]

7000 rpm! what mods do you have?

[xtremesunfire]

GMPD still dont have it under that new casting number

[Manitcor]

you cant even get it anymore at gmpartsdirect.com unless there is a different part number for it

I ordered mine a while back and had it shipped to ben for porting. According to the shipper status it was delievered.

Hey Ben, did it look right?

[tejohnson]

Sure, I just got mine today, ordred it back on ~Feb 20th. The issue is, now it looks like new orders can't be made...

[SappySE107]

Yeah, glad you said something cause I wasn't sure whose it was:P The brake booster nipple was busted off (plastic). You can reuse your current one though.