Terms of Service & Mechanical Disclaimers

All drivetrain gear ratio calculations, highway cruising RPM simulations, cylinder head fastener torque sequences, and wiring circuit diagrams provided on SquarebodyTech are derived from historical General Motors Factory Service Manuals (including series ST-330 and X-7832) and SAE International ground vehicle standards (SAE J1100 and J1349).

These tools and tables are intended strictly as archival engineering reference aids for classic automotive restoration, diagnostics, and educational study. Due to vehicle age, physical chassis deflection, aftermarket modifications, tire pressure variances, and mechanical wear, calculations represent theoretical mathematical models under nominal conditions. Always verify physical fastener torque tolerances and suspension clearances on your vehicle before highway operation.

General Motors, GM, Chevrolet, Chevy, GMC, C10, K10, C20, K20, C30, K30, Suburban, K5 Blazer, Jimmy, Small Block, Big Block, Turbo Hydra-Matic, TH350, TH400, 700R4, SM465, Quadrajet, Detroit Diesel, and related vehicle model designations, RPO option codes, and technical marks are registered trademarks of General Motors LLC.

SquarebodyTech is an independent archival, educational, and mechanical engineering technical platform. The use of General Motors brand and model designations on this website is strictly for nominative, historical, and identification purposes under the US Nominative Fair Use doctrine. SquarebodyTech is not affiliated with, authorized by, sponsored by, or endorsed by General Motors LLC or any of its subsidiaries.

SquarebodyTech is engineered with a strict zero-telemetry architecture. All vehicle identification number (VIN) decodes, SPID option code lookups, RPM calculations, and user preference toggles execute 100% locally within your browser client. We do not transmit, harvest, log, or sell vehicle identification numbers or mechanical configuration setups to any remote server or third-party advertising network.

Any persistence features—including calculation history scratchpads and dark workshop theme preferences—are maintained strictly in your browser's local storage and can be erased at any time by clearing your browser cache.

In no event shall SquarebodyTech, its contributors, or technical authors be held liable for any mechanical failures, property damage, personal injury, or financial loss arising from the use or interpretation of mathematical models, fastener torque specifications, or wiring diagrams published on this website. Automotive assembly and electrical rewiring involve inherent mechanical hazards that require qualified workshop tools and safety protocols.