1971 402 Big Block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigowl · 08-01-2018, 05:27 PM

Hello All -

I have a 1971 suburban with an original 402 motor. Interested in creating more power. The casting number appears to be 3955287.

What are the group's suggestions for more horsepower / performance. An LS swap is a possibility, but I first want to consider what I might do to the original motor and how much more horsepower I can create without a lot of trouble / ripple effects through the rest of the drivetrain, brakes, etc.

I will static drop the vehicle as part of the process.

Suggestions and thoughts welcomed. Thx!

08-01-2018, 05:27 PM	#1
bigowl Registered User Join Date: Jul 2018 Location: Houston, Texas Posts: 16	1971 402 Big Block Hello All - I have a 1971 suburban with an original 402 motor. Interested in creating more power. The casting number appears to be 3955287. What are the group's suggestions for more horsepower / performance. An LS swap is a possibility, but I first want to consider what I might do to the original motor and how much more horsepower I can create without a lot of trouble / ripple effects through the rest of the drivetrain, brakes, etc. I will static drop the vehicle as part of the process. Suggestions and thoughts welcomed. Thx!



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