03-01-2020, 07:01 PM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
Thanks: 3,506
Thanked 136,556 Times in 22,784 Posts
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The 1970 Chrysler 340 Trans Am engine block was drilled for 4 bolt mains, but it only came with 2 bolt mains. Those that raced in the the SCCA Trans Am changed the main caps when building their engines. Chrysler figured it wasn't necessary for street use.
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