V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3.1 Heads on a 3.4 Block?

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Old

Nov 1, 2004 | 12:14 PM

#1

MakeitQuick92RS

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From: Miami, FL

Car: 1988 Pontiac Trans Am

Engine: 383 Stroker

Transmission: T-5

Axle/Gears: Borg Warner 9-Bolt, with 3.42 Gears

3.1 Heads on a 3.4 Block?

Will it work? I can get the block for 200 dollars and the 3.1 heads i got in the garage are machined and port and polished with springs to match the cam. Will it work or will it suck?

Old

Nov 1, 2004 | 12:31 PM

#2

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Car: 1991 RS Camaro (Jet Black)

Engine: 95 383 CI (6.3) LT1

Transmission: 95 T-56

I imagine it would work considering they are the exact same block.

Old

Nov 1, 2004 | 12:35 PM

#3

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From: Tucson, AZ, USA

Car: '99 Trans Am, '86 Camaro

Engine: LS1, Scrap

Transmission: T56, T5

Axle/Gears: 3.42 Stock ZT, 3.42 Open

IIRC, the heads are identical to begin with, so yeah, have a ball

Old

Nov 1, 2004 | 01:09 PM

#4

MakeitQuick92RS

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From: Miami, FL

Car: 1988 Pontiac Trans Am

Engine: 383 Stroker

Transmission: T-5

Axle/Gears: Borg Warner 9-Bolt, with 3.42 Gears

Awesome!!!!

Old

Nov 1, 2004 | 02:12 PM

#5

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From: AR

Car: 1991 Camaro RS Vert

Engine: 350 S-TPI

Transmission: T5

Axle/Gears: GU5/G80/J65

Quote:

Originally posted by TechSmurf
IIRC, the heads are identical to begin with,

Not quite, but if you dont have one right next to the other, you cant tell the difference.

Go get that block.

Old

Nov 12, 2004 | 09:31 PM

#6

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From: Woodstock, GA

Car: 1987 Trans Am

They are essentially the same; we used 2.8 heads (already ported, and with aftermarket springs) on Redraif's 3.4, with no issues.

Old

Nov 13, 2004 | 09:44 PM

#7

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From: ****SoCal, USA****

Prior two replies are correct
Valve Springs are the key to the 3.1 60* heads you have. Have they been replaced?

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