Anyone have photos of these 90 cc prototype SD455 heads?
Am wondering was there ever consideration of reducing the SD455 to an SD400? The 90 cc heads on a 400 would have been perhaps about 8.5 to 1, and the shorter stroke would have allowed using the cast rods if there were supply issues with the forged rods.
If someone has a set, they MUST be reproduced.
Quote:
Originally Posted by Dragncar
Why, because Chevrolet F#%@ed us every chance they had.
PONTIAC, PMD had the biggest balls in General Motors. ... 90cc SD 455 heads that even had the pressed in tubes on intakes ports. 2 sets of those heads were made, 96 casting. Whitmore had a GM tech guy bring a set to his shop and held them in his hands....
PONTIACS RULE.
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