1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year > 1971 Boss

OEM Boss 351 main bearings

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c9zx:
Can anyone confirm, or refute, that Boss 351 Engines came with full groove main bearings? Thanks, Chuck

c9zx:
Bump. Can anyone answer this question? I ask because I'm looking at crank oil hole "timing" to the rod bearings. Thanks, Chuck

J_Speegle:
Don't think I got anything to confirm the design. Might be a quick and easy question for the Boss 351 guys over on the Boss Registry forum

https://www.boss302.com/smf/index.php?board=13.0

c9zx:
Jeff, I have posted the same question there as well. So far nothing. Thanks, Chuck

c9zx:
This information comes from a friend who worked in Ford Parts Department for decades. It answers my question comprehensively. Others my find it useful in the future. Not using full groove mains on 351C causes rod bearing failure when used with a stock crank. The "timing" of the oil holes were not properly indexed to oil the rods when they needed it the most.

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