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Print in friendly format Send this term to a friend  RPO
Regular Production Order. These are the codes that GM uses to identify options.

For example, LT1 is the RPO for the engine used from 1992-1996.
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Re: Make a 350 out of a 400???

Subject: Re: Make a 350 out of a 400???
by Durango_Boy on 2009/6/22 14:19:30

Quote:

anesthes wrote:
Quote:

Durango_Boy wrote:
I'm building a roller 405 out of my Gen1 400, and I'm expecting near 450 FW HP from my combo.


What is the combo?

-- Joe


SBC 400

Front Pad: T10140SA
Casting: 3951511
Date: J12-72

Compression Ratio Data

Bore Size - 4.145"
Piston Stroke - 3.75"
Head Gasket Bore - 4.190"
Compressed Gasket Thickness - 0.038"
Chamber Volume - 64cc
Dish Volume - 12.5cc
Deck Clearance - 0.025"

Estimated SCR - 10.15:1

405 ci (Bored +.020)
6.638 liters per cyl.
6633.85 CCs
Retrofitted for V6 Hydraulic Roller Lifters
5.7" Rods
12.5cc Dish Speed Pro Pistons

COMP CAMS SBC 288 XTREME ENERGY HYD. ROLLER CAM #12-433-8

64cc chamber/ 190cc Intake Runner Aluminum Vortec Heads .600" Springs
Self Aligning Roller Rockers
Vortec Air Gap Intake Manifold
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