62- SBC To BOP TH350/400 Trans Adapter

The 62- SBC To BOP TH350/400 Trans Adapter by TRANS-DAPT is a precision-engineered steel coupling designed to mate Small Block Chevrolet (SBC) engines with Buick-Oldsmobile-Pontiac (BOP) transmissions, specifically the TH350, TH400, 700R4, and ST300 models. This adapter fills a critical gap in engine-to-transmission compatibility for hot rodders, engine swap enthusiasts, and builders seeking maximum flexibility in drivetrain configuration. Whether you're building a classic muscle car restomod, installing a modern small-block engine in a vintage BOP-equipped chassis, or maximizing torque converter options for performance applications, this adapter eliminates the need for expensive custom fabrication or engine bay modifications.

Manufactured from high-strength steel in natural finish, the adapter features precision-machined bolt holes that maintain strict OEM centering tolerances and flywheel-to-converter bore alignment—critical factors for vibration-free operation and transmission longevity. The 7.08-pound weight and compact 12.3 x 1.4 x 22.5-inch profile minimize added rotating mass while fitting cleanly in most engine bays without requiring exhaust or cooling system relocation. The natural steel construction allows users to finish the adapter to match their engine's appearance, whether powder-coat black for a stealth look or polished for a show-quality engine bay. This adapter maintains proper crankshaft-to-transmission centerline alignment, ensuring smooth power delivery and preventing premature wear on transmission seals and bearings.

Ideal for builders working with Chevrolet 262, 267, 283, 305, 327, 350, and 400 cubic-inch small-block engines paired with BOP transmission platforms, this adapter is essential for engine swap projects where original transmission retention is desired or where a specific gearbox's overdrive, gear ratios, or torque converter characteristics suit the build better than factory Chevy transmission options. Professional mechanics and serious enthusiasts rely on TRANS-DAPT's precision fitment to eliminate guesswork and ensure first-time assembly success. Installation requires standard socket and wrench tools; proper torque specifications and alignment procedures are recommended to achieve optimal results and long-term reliability in both street and performance-oriented applications.