I am a firm believer that a 350 would be the best overall stock-block turbo combination, by virtue of the block's beefiness, the smaller bore giving more surface area for head gasket effectiveness and the fact that they are still as cheap as landfill. While the combo might not make as much total power as a larger bore Pontiac, I think you will still be way past the point of being able to get it all to the ground without some serious traction aids. I am collecting parts to build one right now.
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Founding Editor-in-Chief, Poncho Perfection 10/1/15-12/31/24)
Contributing Editor: Collectible Automobile (1999- )
Author:
"Grand Prix: Pontiac's Luxury Performance Car" (4/27/07)
"How to Restore Your Pontiac GTO" (7/15/2012))
"Pontiac Concept and Show Cars, 1939-1980" (3/25/16)
"Pontiac Performance 1960-1974: The Era of the Super Duty, H.O., & Ram Air Drag & Muscle Cars” (10/15/24)
"Leave the gun, take the cannoli."
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