Mar 29, 2025 · Cutlass, 442, and Hurst/Olds . Cutlass . 442 . Hurst/Olds ... 442 Fan Clutch removed from a... by WTHIRTY1 ...

70-Olds-442-convt on Dec 18, 2010. Mar 15, 2025 03:01 PM by BBLima. 42. 24,838 '66 442 front fenders.

All Olds big block heads have the same mounting holes, port sizes, etc., and thus are interchangeable. Even the combustion chambers are equal at 80cc, plus or minus a little. Olds achieved different compression ratios by using pistons with different size dishes in the top. Some W-30 heads were rumored to have been factory-milled for a smaller ...

It is funny how the public relations people at Olds advertised the compression ratio in the 442 at 10.5 to 1 and the W-33 Delta and the Toro W-34 were 10.25 to 1. The horsepower ratings were so varied on these 3 identical engines too!

1969 - 1970 Toronado 455 vs 442 455 I know 365 horses is the stock rating for the 442, but what about the Toronado. I have an F block and E heads. What is my engine out of and what is the horsepower rating for the 69 & 70 Toronado? The stock Toronado intake is noticeably lower than the intake on the 442 motor. This is the most obvious giveaway.

The N83 wheels came only with the high-performance Cutlasses (H/O, 442) from 1983-1987. The Hurst/Olds wheels had argent painted insets and a red pinstripe, whereas the 442 versions had gold painted insets and gold pinstripes. Also distinguishing the 442 wheels are the center caps, which read '442'. All wheels were of a two-piece design.

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83-84 Hurst Olds 85-87 Olds 442 84-87 Grand National/T-Type (Turbo) These "quickest" steering boxes did not come in every "G" body, so before you take one out of a donor car, or pay the recycle yard for one, always count the number of turns from lock to lock. As stated, the quick ratio's are between 2 1/4 to 2 3/4 turns.

Olds rates duration at zero lift, while most cam manufacturers rate duration at .050" lift. ST = standard trans AT = automatic trans 2BC/4BC: 2 or 4 barrel carb OAI = outside air induction Roller lifters and cams were in all 1986 and up 307's, and most 1985 307's.

The Olds engine your thinking of is the 65-67 400's. They all used flat top pistons and had the same A, B, C, heads that were used on all engines during those years. The 66-67 W-30's even used that .474 lift / 308 duration cam. So there shouldn't be …