Enginetech BC329JSTD Crankshaft Main Bearing Set AMC 290 304 343 360 390 401 Standard Size

The Enginetech BC329JSTD is a standard-size crankshaft main bearing set engineered for AMC/Jeep V8 engines, including the 290, 304, 343, 360, 390, and 401 cubic inch displacements produced from 1966 through 1991. Designed as a direct OEM replacement, this bearing set is an essential component for engine rebuilds, re-ring jobs, and crankshaft reconditioning on these classic American-made V8 powerplants.

Key Features:

• Standard Size (STD) — designed for use with a standard, unmachined crankshaft journal
• Compatible with AMC/Jeep 290, 304, 343, 360, 390, and 401 V8 engines (1966–1991)
• Manufactured in ISO, QS, and TS certified quality facilities to ensure consistent tolerances and reliable fitment
• Engineered to meet or exceed original equipment specifications for oil clearance and bearing crush
• Full product line coverage — also available in 0.010", 0.020", 0.030", and 0.040" undersizes for machined crankshafts

About Enginetech:

Enginetech is a leading supplier of internal engine components for domestic, import, and performance applications. Their bearings are produced in facilities operating under strict ISO, QS, and TS quality management systems, providing engine builders with confidence in every rebuild.

This main bearing set is ideal for professional engine builders and experienced DIY mechanics performing a complete engine overhaul on AMC or Jeep V8-powered vehicles. Always verify crankshaft journal dimensions and condition before selecting bearing size.