Nice '68 Hurst Olds on eBay

[SmallHurst]

I love this, something I can answer. For the red inner fenders, they were plastic and red colored (easy answer). For the harder one, the difference between the 69 H/O motor and the 70 w 30 motor is actually minor. The 69 H/O moved the outside air induction (OAI) from under the bumper scoops (68 & 69 W30's and Ramrod w31's) to hood scoops dumping into the top of the air cleaner which was sealed to the hood (think cowl induction system with the flapper valve being on top of the air cleaner). The intake for the '69 H/O was a one year piece. The PCV was placed in the valley of the intake. All were supposed to have 'D' heads on them with 'W' & 'Z' exhaust manifolds in place. The '70 w30 motor replaced the cast iron intake with an aluminium piece, 'F' heads, and a modified OAI setup. The '69 motor was definately the precursor to the '70 w-30 motor.

Dave or Casey, I do not have the cam numbers in front of me. Could you please help me out on this one!

[StealthBird]

I believe the 70 W-30 engines were a bit more unique than the 69 H/O. The 70 W-30 used specific "F" heads (arguably the best Olds heads, except for maybe the "C" castings), special exhaust manifolds, aluminum intake, much wilder cam (328 duration in the 4-speed), and was available with the W-27 rear end.

I always wondered why Olds chose the red inner fenders for their 66-69 W-30 cars, used them on the 68 H/O, but went to black on the 69 H/O, then back to red for the 70 W-30. Maybe it they just didn't like the look of the red inners with a white/gold paint scheme?

[Belair62]

Compare the 68 H/O motor with the W30...

[SmallHurst]

'D' heads were specific to only the '68 and '69 W30 and H/O's. These heads flowed almost as well as the 'F' heads on the 70 W30. I will refer you to the chart on head flows that my buddy has put together, MidAm Performance

As for the '68 motor, they differed by having an a/c motor and a non-a/c motor. The a/c motor used a milder cam and 'C' casting heads while the non-air car received the 'D' heads and the more agressive cam. The '68 used the standard 442 manifold.