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#1
03-17-2026, 09:58 AM
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1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
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#2
03-17-2026, 10:33 AM
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The little I could find to read , Pontiac metallurgical Engineering did a good job with the crank makeup. I've never run nitrous. My friend who built , ran dirt track, Pontiacs used the stock cranks,usually 428 never heard of one breaking. The driver one night did try to adjust timing with very bad results to a RA IV head. My street 421,400s saw 6400 back in the early 70s with cast rods. Cranks are still good in garage. Now if you are going full bore maximum effort,then aftermarket block ,the best rods ,and best crank you can buy!
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