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Paul Ceasrine · 10-17-2011, 10:27 AM

Ed,

The 1968 Pontiac GTO 'Ram Air I'.

Option Code #342,,,,,,$342.89

The 400/360 HP 'Ram Air I' was more potent than the 400/360 'HO'.

Block Casting #'s; WS or YZ (4-Bolt Main Blocks)
Pistons; 10.75 compression,,,, (same as the 'HO')
Cylinder Heads; Casting #31 (2.11 Intake / 1.77 Exhaust) (72 cc's) (Open chamber)
Cast Iron Exhaust Headers,,, (same as the 'HO')
Camshaft; (Hydraulic) .425 Intake / .424 Exhaust (301*/313* Duration) (119 Centerline) (76* Overlap)
Rochester Quadra-Jet (750 cfm) Model #7028275
Cast Iron Intake Manifold (#9790140 same as the 'HO')

The main engine differences between the 'Ram-Air I' and the 'HO' were,
the 'Ram-Air I' had a 4-Bolt Main Block, and the #744 camshaft, which had more duration
and overlap.

The #31 casting cylinder heads had the same valve and port size, but the combustion chambers were a true 72 cc's. (Generally regarded as better casting cylinder heads).

The cast iron intake manifolds (#9790140) were the same on each engine.

Both engines had the special long-branch cast iron exhaust manifolds.

The Rochester 750 CFM carburetors were almost identical, except the
# 7028275 'Ram-Air I' carburetor had more jet area.
---------------------------------------------------------------------------------------------------------------------------------

All GTO Ram-Air cars were to be equipped with 4.33 gears.
But the mandatory Safe-T-Track Differential option (Code #361) was required ($63.19)

The M-21 close ratio 4-speed was an option (2.20 1st, 1.64 2nd, 1.28 3rd, 1.00 4th),
Code #358 for a cost of ($184.31)

The 'Ram Air I' 400/360HP cars were built between December 1967 thru March 1968.
--------------------------------------------------------------------------------------------------------------------------------

The 400/360HP 'Ram Air I" did make its mark early.
At the 1968 NHRA Winternationals, Gary Brookshire out of Visalia, California
won the D/Stock Class with his new 1968 GTO.
Ran 12.70's @ 110 MPH.
As he took out a host of 68' Mopar GTX 440's, and 68' Olds 4-4-2's.

10-17-2011, 10:27 AM	#29
Paul Ceasrine VIP Member Join Date: Apr 2009 Posts: 2,546 Likes: 0 Liked 10 Times in 10 Posts	Re: 1968 Pontiac GTO Ed, The 1968 Pontiac GTO 'Ram Air I'. Option Code #342,,,,,,$342.89 The 400/360 HP 'Ram Air I' was more potent than the 400/360 'HO'. Block Casting #'s; WS or YZ (4-Bolt Main Blocks) Pistons; 10.75 compression,,,, (same as the 'HO') Cylinder Heads; Casting #31 (2.11 Intake / 1.77 Exhaust) (72 cc's) (Open chamber) Cast Iron Exhaust Headers,,, (same as the 'HO') Camshaft; (Hydraulic) .425 Intake / .424 Exhaust (301/313 Duration) (119 Centerline) (76* Overlap) Rochester Quadra-Jet (750 cfm) Model #7028275 Cast Iron Intake Manifold (#9790140 same as the 'HO') The main engine differences between the 'Ram-Air I' and the 'HO' were, the 'Ram-Air I' had a 4-Bolt Main Block, and the #744 camshaft, which had more duration and overlap. The #31 casting cylinder heads had the same valve and port size, but the combustion chambers were a true 72 cc's. (Generally regarded as better casting cylinder heads). The cast iron intake manifolds (#9790140) were the same on each engine. Both engines had the special long-branch cast iron exhaust manifolds. The Rochester 750 CFM carburetors were almost identical, except the # 7028275 'Ram-Air I' carburetor had more jet area. --------------------------------------------------------------------------------------------------------------------------------- All GTO Ram-Air cars were to be equipped with 4.33 gears. But the mandatory Safe-T-Track Differential option (Code #361) was required ($63.19) The M-21 close ratio 4-speed was an option (2.20 1st, 1.64 2nd, 1.28 3rd, 1.00 4th), Code #358 for a cost of ($184.31) The 'Ram Air I' 400/360HP cars were built between December 1967 thru March 1968. -------------------------------------------------------------------------------------------------------------------------------- The 400/360HP 'Ram Air I" did make its mark early. At the 1968 NHRA Winternationals, Gary Brookshire out of Visalia, California won the D/Stock Class with his new 1968 GTO. Ran 12.70's @ 110 MPH. As he took out a host of 68' Mopar GTX 440's, and 68' Olds 4-4-2's. Last edited by Paul Ceasrine; 10-18-2011 at 01:43 PM.