||1974 GTO FAQ
Could you order a 1974 GTO with a 400ci engine?
- No, Pontiac only offered the 350ci 200hp
engine in the 1974 GTO.
Could you get a 1974 GTO with a Manual
transmission in the State of California?
- No, 1974 GTO's sold in the State of
California could only be ordered with the Turbo Hydra-matic transmission.
difficult to come by - where can I buy them?
- Parts from
the 73-74 Chevy Nova, Olds Omega, Pontiac Ventura, or Buick Apollo may fit. Refer to the parts number catalog
under resources. (By the way, I was told by Jim Wangers the "Green"
letters spell out NOVA. Interesting fact! )
- I have found
Ames Performance in New Hampshire to have the most reproduction parts and some NOS, but
not many. Check in Hemmings monthly under Pontiac and call the salvage yards.
They may have some of the cars above and the parts you need. Also, check out Ebay
The hardest parts to find? "RTS" (Radial Tuned Suspension) label
that attaches to the dash by the ashtray, and any of the exterior emblems in decent shape.
- Bill Dunne
According to the literature I got
from PHS (for 350 V8):
Bore and Stroke: 3.8762
Cylinder Head Volume:
Head Gasket Thickness:
Deck Clearance: .0038
(above block) that would make it a negative deck clearance?
With a piston valve relief =
0cc (no valve reliefs)
I get exactly 8.0:1
compression ratio - which is what my shop manual says it should be (8.0:1) for a 350
2 bbl but doesn't list for a 350 4 bbl... All the articles and books I've ever
read claim the 74 GTO had a 7.6:1 compression ratio.
- Adam Womack
The '46' is cast onto the heads
on the 74 GTO. I've heard it described as cast on a pad on the head between the
exhaust ports. I think on a clean non-corroded head, you can see that the head has a
slightly raised and flat pad/square/rectangle with the 46 cast on top of this
To the best of my knowledge,
the 74 GTO head is the only 46 head produced in 74 with screw-in studs. All other 46
heads in 74 had pressed in studs.
I believe there was another
46 screw-in stud head but I think it was produced in maybe '68 so checking date codes will
eliminate this head.
- Charlie in Tennessee
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